Iridium-catalyzed borylation of thiophenes: versatile, synthetic elaboration founded on selective C–H functionalization
作者:Ghayoor A. Chotana、Venkata A. Kallepalli、Robert E. Maleczka、Milton R. Smith
DOI:10.1016/j.tet.2008.02.111
日期:2008.6
various substituted thiophenes to synthesize poly-functionalized thiophenes in good to excellent yields. Apart from common functionalities compatible with iridium-catalyzed borylations, additional functional group tolerance to acyl (COMe), and trimethylsilyl (TMS) groups was also observed. High regioselectivities were observed in borylation of 3-and 2,5-di-substituted thiophenes. Electrophilic aromatic
Divergent Synthesis of 2,3,5-Substituted Thiophenes by C-H Activation/Borylation/Suzuki Coupling
作者:Robert E. Maleczka、Milton R. Smith、Venkata A. Kallepalli、Luis Sánchez、Hao Li、Nathan J. Gesmundo
DOI:10.3987/com-09-s(s)135
日期:——
C-H activation/borylation has been married with Suzuki coupling to prepare DuP 697 (1) and analogs that would be otherwise difficult to obtain via the traditional synthetic route to 1.