Convergent One-Pot Oxidative [n+ 1] Approaches to Spiroacetal Synthesis
摘要:
Two one-pot oxidative annulative approaches to spiroacetal synthesis are described. One approach uses a Lewis acid mediated Ferrier reaction in the fragment-coupling stage followed by DDQ-promoted oxidative carbon-hydrogen bond cleavage and cyclization. An alternative approach employs a Heck reaction for fragment coupling followed by DDQ-mediated enone formation and cyclization. These strategies provide convergent routes to common subunits in natural products, medicinal agents, and chemical libraries under mild reaction conditions.
Convergent One-Pot Oxidative [n+ 1] Approaches to Spiroacetal Synthesis
摘要:
Two one-pot oxidative annulative approaches to spiroacetal synthesis are described. One approach uses a Lewis acid mediated Ferrier reaction in the fragment-coupling stage followed by DDQ-promoted oxidative carbon-hydrogen bond cleavage and cyclization. An alternative approach employs a Heck reaction for fragment coupling followed by DDQ-mediated enone formation and cyclization. These strategies provide convergent routes to common subunits in natural products, medicinal agents, and chemical libraries under mild reaction conditions.
Silylation of primary alcohols with recyclable ruthenium catalyst and hydrosilanes
作者:Sungjin Kim、Min Serk Kwon、Jaiwook Park
DOI:10.1016/j.tetlet.2010.06.119
日期:2010.8
The silylation of primary alcohols was achieved using hydrosilanes and a recyclable ruthenium catalyst without additives under mild conditions. Notably, this catalyst system is effective for the silylation of alcohols having haloaryl groups, which were intact during the silylation. (C) 2010 Elsevier Ltd. All rights reserved.