反应详情

The alkylation of 5-n-butyl-2,4-dihydro-4-[[2'-(N-trityltetrazol-5-yl)biphenyl-4-yl]methyl]-3H-1,2,4-triazol-3-one (from Example 2, Step D) with 3-bromopropyl-N-methyl-N-phenylcarbamate was carried out as described in Example 3, Step A, except that only 2.4 equivalents of the alkylating agent was used. After work-up, the residue was flash chromatographed over silica gel (35 mL for 0.162 mmole, gradient elution using 0.75-2.5% MeOH/CH2Cl2) to give the desired material as a white foam in 86% yield, mass spectrum (FAB) 809 (M+1)+.

1. customchromatographed over silica gel (35 mL for 0.162 mmole, gradient elution using 0.75-2.5% MeOH/CH2Cl2)