5-chloro-2-methylbenzenesulfonyl chloride

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: This material was prepared in analogy to example 1 from 5-cyclopropylmethoxymethyl-6-methyl-pyridin-2-ylamine (0.06 g) and 3-chloro-6-methyl-benzenesulfonyl chloride (0.072 g) as a light yellow solid (0.07 g). MS (ESI−): 364.9 ([M−H] )

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

Procedure: A solution of 3810.5 g of 5-chloro-2-methylbenzenesulfonyl chloride in 10.8 L of tetrahydrofuran was cooled to 0°-5° C. and 720 g of anhydrous ammonia was added while maintaining the temperature at 0°-5° C. When addition was complete, the suspension was stirred several hours at 0°-5° C., then allowed to warm to ambient temperature overnight. The precipitated ammonium chloride was filtered and washed with tetrahydrofuran. The filtrate was concentrated in vacuo until solids were formed. The solids were collected, washed with 1-chlorobutane and dried to give 2449 g of the title compound, m.p. 142°-145° C. while maintaining the temperature at 0°-5° C When addition The precipitated ammonium chloride was filtered washed with tetrahydrofuran The filtrate was concentrated in vacuo until solids were formed The solids were collected washed with 1-chlorobutane dried

Conditions: temp:15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 5-Chloro-2-methylbenzeneamine (1002 g) was added over 0.5 hr. to a stirred mixture of 5.5 L of concentrated hydrochloric acid and 1.5 L of acetic acid precooled to 0°-5° C. The resulting suspension was stirred 0.5 hr. A solution of 530 g of sodium nitrite in 0.9 L H2O was added over 1.0 hr. while maintaining the temperature at 0°-5° C. When addition was complete, the mixture was stirred 1.0 hr. at 0°-5° C. The diazonium salt was added to a stirred mixture of 6.0 L of acetic acid, 1000 g of sulfur dioxide and 16.8 g of cuprous chloride while maintaining the temperature about 15° C. When addition of the diazonium salt was complete, the mixture was stirred several hours at about 15° C. then allowed to warm to ambient temperature and stirred overnight. The reaction mixture was poured into ice-water, and the aqueous mixture was extracted with 12 L of methylene chloride. The organic solution was washed twice with 6 L water followed twice with 4 L of saturated sodium bicarbonate solution. The organic solution was dried over magnesium sulfate, filtered and the solvent evaporated in vacuo to give 1279.9 g of the title compound as a black oil. precooled to 0°-5° C while maintaining the temperature at 0°-5° C When addition the mixture was stirred 1.0 hr at 0°-5° C the mixture was stirred several hours at about 15° C. to warm to ambient temperature stirred overnight the aqueous mixture was extracted with 12 L of methylene chloride The organic solution was washed twice with 6 L water The organic solution was dried over magnesium sulfate filtered the solvent evaporated in vacuo