Alpha-amino silanes via metalated imines as an approach to the synthesis of silanediol protease inhibitors
摘要:
Metalation of benzophenone imines for elaboration of the alpha-amino silane component of silanediol-based protease inhibitors allows for rapid diversification of targets. Coupling this chemistry with recently developed asymmetric hydrosilylation chemistry for preparing beta-silyl acids results in a streamlined process for drug design. (C) 2013 Elsevier Ltd. All rights reserved.
Efficient Asymmetric Synthesis of Silanediol Precursors from 1,5-Dihydrosiloles
摘要:
Dihydrosiloles are easily prepared from 1,3-dienes and dichlorosilanes, even on kilogram scale. Asymmetric hydroboration of a 3-alkyl-1,5-dihydrosilole, prepared from a 2-alkyl-1,3-diene, followed by treatment with aqueous HF results in Peterson fragmentation, forming optically active 3-alkyl-4-fluorosilyl-1-butenes. The fluorosilanes are stable to moisture but very reactive toward, nucleophiles. In addition, they can be converted to nucleophilic silyllithium reagents.