Mal-amido-PEG8-NHS ester

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-(4-aminomethyl-2,6-difluorobenzoylamino)-3-[4-(1,3,6-trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)phenyl]propionic acid TFA salt (121 mg, 0.2 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)- propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (258 mg, 348 uL, 2.0 mmol), and after HPLC purification, resulted in a white solid (80 mg, 38%). ES(+)-HRMS m/e calcd. for C50H66F2N6O17 (M+H)+ 1061.4526, obsd. 1061.4521. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[4-(3-aminopropoxy)-2,6-dichlorobenzoylamino]-3-[4-(1,3,6-trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)phenyl]propionic acid trifluoroacetate salt (98 mg, 0.145 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (187 mg, 252 uL, 1.45 mmol), and after HPLC purification, resulted in a hygroscopic white solid (88 mg, 53%). ES(+)-HRMS m/e calcd. for C52H70Cl2N6O18 (M+H)+ 1137.4197, obsd. 1137.4196. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[4-(3-aminopropoxy)-2,6-dichlorobenzoylamino]-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid (107 mg, 0.15 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (194 mg, 261 uL, 1.5 mmol), and after HPLC purification, resulted in a white solid (50 mg, 28%). ES(+)-HRMS m/e calcd. for C52H65Cl4N5O17 (M+Na)+ 1194.3022, obsd. 1194.3028. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[[1-(2-aminoethyl)cyclopentanecarbonyl]amino]-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid (607 mg, 1.0 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)propionylamino]- ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (689 mg, 1.0 mmol), and DIPEA (388 mg, 522 uL, 3.0 mmol), and after HPLC purification, resulted in a light yellow solid (788 mg, 74%). ES(+)-HRMS m/e calcd. for C50H69Cl2N5O16 (M+H)+ 1066.4189, obsd. 1066.4182. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-(4-aminomethyl-2,6-difluorobenzoylamino)-3-[4-(1,3,6-trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)phenyl]propionic acid TFA salt (121 mg, 0.2 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)- propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (258 mg, 348 uL, 2.0 mmol), and after HPLC purification, resulted in a white solid (80 mg, 38%). ES(+)-HRMS m/e calcd. for C50H66F2N6O17 (M+H)+ 1061.4526, obsd. 1061.4521. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[4-(3-aminopropoxy)-2,6-dichlorobenzoylamino]-3-[4-(1,3,6-trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)phenyl]propionic acid trifluoroacetate salt (98 mg, 0.145 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (187 mg, 252 uL, 1.45 mmol), and after HPLC purification, resulted in a hygroscopic white solid (88 mg, 53%). ES(+)-HRMS m/e calcd. for C52H70Cl2N6O18 (M+H)+ 1137.4197, obsd. 1137.4196. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[4-(3-aminopropoxy)-2,6-dichlorobenzoylamino]-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid (107 mg, 0.15 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (194 mg, 261 uL, 1.5 mmol), and after HPLC purification, resulted in a white solid (50 mg, 28%). ES(+)-HRMS m/e calcd. for C52H65Cl4N5O17 (M+Na)+ 1194.3022, obsd. 1194.3028. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[[1-(2-aminoethyl)cyclopentanecarbonyl]amino]-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid (607 mg, 1.0 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)propionylamino]- ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (689 mg, 1.0 mmol), and DIPEA (388 mg, 522 uL, 3.0 mmol), and after HPLC purification, resulted in a light yellow solid (788 mg, 74%). ES(+)-HRMS m/e calcd. for C50H69Cl2N5O16 (M+H)+ 1066.4189, obsd. 1066.4182. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-(4-aminomethyl-2,6-difluorobenzoylamino)-3-[4-(1,3,6-trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)phenyl]propionic acid TFA salt (121 mg, 0.2 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)- propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (258 mg, 348 uL, 2.0 mmol), and after HPLC purification, resulted in a white solid (80 mg, 38%). ES(+)-HRMS m/e calcd. for C50H66F2N6O17 (M+H)+ 1061.4526, obsd. 1061.4521. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[4-(3-aminopropoxy)-2,6-dichlorobenzoylamino]-3-[4-(1,3,6-trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)phenyl]propionic acid trifluoroacetate salt (98 mg, 0.145 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (187 mg, 252 uL, 1.45 mmol), and after HPLC purification, resulted in a hygroscopic white solid (88 mg, 53%). ES(+)-HRMS m/e calcd. for C52H70Cl2N6O18 (M+H)+ 1137.4197, obsd. 1137.4196. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[4-(3-aminopropoxy)-2,6-dichlorobenzoylamino]-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid (107 mg, 0.15 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-propionylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (100 mg, 0.145 mmol), and DIPEA (194 mg, 261 uL, 1.5 mmol), and after HPLC purification, resulted in a white solid (50 mg, 28%). ES(+)-HRMS m/e calcd. for C52H65Cl4N5O17 (M+Na)+ 1194.3022, obsd. 1194.3028. after HPLC purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared using a similar procedure as described in Example 1, Step 11, starting from (S)-2-[[1-(2-aminoethyl)cyclopentanecarbonyl]amino]-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid (607 mg, 1.0 mmol), 3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)propionylamino]- ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propionic acid-2,5-dioxo-pyrrolidin-1-yl ester (689 mg, 1.0 mmol), and DIPEA (388 mg, 522 uL, 3.0 mmol), and after HPLC purification, resulted in a light yellow solid (788 mg, 74%). ES(+)-HRMS m/e calcd. for C50H69Cl2N5O16 (M+H)+ 1066.4189, obsd. 1066.4182. after HPLC purification