Syntheses and reactions of (R)-(C10H6)2M2 (M=SnMeCl2, SnMe2Cl, SnMe(OTf)2, SnMe2OTf, SiMe2I) as novel chiral 2,2′-bis-metallic-1,1′-binaphthyl catalysts
(R)-(C10H6)(2)M-2 (M=SnMeCl2, SnMe2Cl, SnMe(OTf)(2), SnMe2OTf, SiMe2I) were synthesized as novel chiral 2,2'-bismetallic-1,1'-binaphthyl catalysts. The catalytic activities were evaluated in the Diels-Alder reaction of methacrolein and cyclopentadiene and the asymmetric acylation reaction of racemic 1-phenyl-1,2-ethanediol. (C) 2002 Published by Elsevier Science Ltd.
Synthesis and chemistry of 2,2′-bis-silyl-substituted 1,1′-binaphthyl derivatives
作者:Fabrizio Fabris、Ottorino De Lucchi
DOI:10.1016/0022-328x(95)05791-m
日期:1996.2
A number of hitherto unknown 1,1′-binaphthyl derivatives bearing silyl suubstituents at the 2,2′ positions have been prepared. The 2,2′-bis(dimethylsilyl)-1,1′-binaphthalene 2a is stable in the pure state, but it converts smoothly into the cyclic disiloxane 4a with water and acids or bases. The latter siloxane 4a can be converted back into the starting bishydrosilane 2a with lithium aluminim hydride