Examination of pinanediol–boronic acid ester formation in aqueous media: relevance to the relative stability of trigonal and tetrahedral boronate esters
作者:Mayte A. Martínez-Aguirre、Marcos Flores-Alamo、Felipe Medrano、Anatoly K. Yatsimirsky
DOI:10.1039/d0ob00201a
日期:——
study of the stability of the six-membered cyclic boronate esters of chromotropic acid demonstrated the order Ktrig ≪ Ktet although the strain was absent in these esters. The results for m-, p-substituted phenylboronic acids show that the stability of both five- and six-membered trigonal esters formed with pinanediol and chromotropic acid, respectively, is insensitive to electronic effects but the
申请人:Commonwealth Scientific and Industrial Research Organisation
公开号:US06680401B1
公开(公告)日:2004-01-20
The invention relates to processes for the synthesis of aryl or alkene borates which comprises reacting: (i) an olefinic compound having a halogen or halogen-like substituent in a vinylic substitution position, or (ii) an aromatic ring having a halogen or halogen-like substituent in a ring substitution position, with a disubstituted monohydroborane in the presence of a Group 8-11 metal catalyst. The invention also relates to the use of these borates in coupling reactions. The invention further relates to certain disubstituted monohydroboranes and aryl or alkene borates.