Isopropylamine → Methyl(2S)-2-(tert-butoxy)-2-[(22S)-17-fluoro-4,22,28-trimethyl-5-{[(propan-2-yl)amino]methyl}-21,27-dioxa-1,7,34-triazahexacyclo[26.2.2.16,9.110,14.02,7.015,20]tetratriaconta-2,4,6(34),8,10(33),11,13,15(20),16,18-decaen-3-yl]acetate

Participants

Reaction Steps

Methyl(2S)-2-(tert-butoxy)-2-[(22S)-17-fluoro-5-formyl-4,22,28-trimethyl-21,27-dioxa-1,7,34-triazahexacyclo[26.2.2.16,9.110,14.02,7.015,20]tetratriaconta-2,4,6(34),8,10(33),11,13,15(20),16,18-decaen-3-yl]acetate (40 mg, 0.058 mmol, 1.0 equiv) was mixed with propan-2-amine (6.90 mg, 0.117 mmol, 2.0 equiv) in Tetrahydrofuran (583 μl) and Methanol (146 μl). The solution was stirred for 2 hours. LCMS show about 50% conversion to imine. Then to this solution was added sodium cyanoborohydride (21.99 mg, 0.350 mmol, 6.0 equiv) and stirred for 2 hours. The mixture was used for next reaction directly. LCMS (ESI, M+1): 729.4.

Provenance & Evidence