1,1-dichloro-2,2-diethoxyethane

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

Procedure: In 100 ml of benzene, 9.4 g of dichloroacetaldehyde diethylacetal was reacted with 5.4 g of propane-1,3-dithiol. After distilling off the benzene/ethanol azeotrope at 68° C., there was obtained a yield of 10.2 g of the title compound, nD30 1.5850. The structure was supported by analytical data. After distilling off the benzene/ethanol azeotrope at 68° C.

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

Procedure: In 100 ml of benzene, 9.4 g of dichloroacetaldehyde diethylacetal was reacted with 5.4 g of propane-1,3-dithiol. After distilling off the benzene/ethanol azeotrope at 68° C., there was obtained a yield of 10.2 g of the title compound, nD30 1.5850. The structure was supported by analytical data. After distilling off the benzene/ethanol azeotrope at 68° C.

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

Procedure: To a solution of dichloroacetaldehyde diethylacetal (25 g; 0.1336 mol) in 150 ml of THF cooled to 0° C. was added 17.99 g (0.16 mol) of potassium t-butoxide in 50 ml of THF. The ice-bath was removed, and the reaction mixture was allowed to reflux for 16 hr and cooled. The reaction mixture was filtered (through celite) and a pale yellow solution was concentrated in vacuo at 30° C. The residue was distilled to afford 18.1 g (90%) of 2-chloro-1,1-diethoxyethylene (Formula V: R3 =Cl; R4 =H; R5 =R6 =OC2H5), a colorless liquid, b.p. 70°-76° C./20-25 mm. The ice-bath was removed to reflux for 16 hr cooled The reaction mixture was filtered (through celite) a pale yellow solution was concentrated in vacuo at 30° C The residue was distilled

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

Procedure: A mixture of 5 g of dichloro-acetaldehyde diethyl-acetal, 25 g of octanol and 0.1 g of 4-methyl-benzene-sulphonic acid is heated on a water-bath for 5 hours, then distilled. is heated on a water-bath for 5 hours distilled

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

Procedure: A mixture of 5 g of dichloro-acetaldehyde diethyl-acetal, 30 ml of propanol and 0.1 g of 4-methyl-benzene-sulphonic acid is heated on a water-bath for 5 hours, then distilled. is heated on a water-bath for 5 hours distilled

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

Procedure: In 100 ml of benzene, 9.4 g of dichloroacetaldehyde diethylacetal was reacted with 5.4 g of propane-1,3-dithiol. After distilling off the benzene/ethanol azeotrope at 68° C., there was obtained a yield of 10.2 g of the title compound, nD30 1.5850. The structure was supported by analytical data. After distilling off the benzene/ethanol azeotrope at 68° C.