Methyl chloroformate → HCID 178462816, compound

Participants

Reaction Steps

trans 4-[6-(4-amino-phenylamino)-9-ethyl-9H-purin-2-yl-amino]-cyclohexanol (example 77, stage 1.2, 100 mg, 0.272 mmol) is suspended in 1 ml dichloromethane and treated with 21 μl (0.272 mmol) methyl chloroformate. The reaction mixture is stirred at RT for 20 h after which another equivalent of methyl chloroformate (21 μl, 0.272 mmol) is added. After additional 23 h at RT the reaction mixture is evaporated and the product purified by chromatography on silica gel (CH2Cl2/MeOH 95:5). {4-[9-ethyl-2-(trans-4-hydroxy-cyclo-hexylamino)-9H-purin-6-yl-amino]-phenyl}-carbamic acid methyl ester is obtained as tan crystals, 93 mg (81%). m.p. 131-135° C.; MS [M+H]+426; HPLC (System h) tR=4.84 min.

Provenance & Evidence