PREPARATION AND REACTIONS OF 2-SUBSTITUTED 3-TRIMETHYLSILYL-4-EN-1-ONE SYSTEM
作者:Isao Kuwajima、Toshihiko Tanaka、Kunio Atsumi
DOI:10.1246/cl.1979.779
日期:1979.7.5
Various 3-trimethylsilyl-4-en-1-one types of compounds have been prepared by using 3-trimethylsilylallyl alcohol. Some of them can be efficiently converted into the corresponding cyclization products, 3-cyclopenten-1-ols, or dienone types of compounds.
An Environmentally Benign Synthesis of <i>cis</i>-2,6-Disubstituted Tetrahydropyrans via Indium-Mediated Tandem Allylation/Prins Cyclization Reaction
作者:Minh Pham、Amir Allatabakhsh、Thomas G. Minehan
DOI:10.1021/jo7016857
日期:2008.1.1
cis-2,6-disubstituted tetrahydropyrans in good yields. Evidence suggests that InI, formed upon aldehyde (R1CHO) allylation in aqueous media, acts as a promoter for the silyl-Prins reaction with the second equivalent of added aldehyde (R2CHO). The preparation of cyclohexenyl-fused pyrans via this one-pot, three-component coupling process is presented, as is a short formal synthesis of (±)-centrolobine
A Rh-catalyzed two-fold, regioselective and enantioselective C–H activation via chiral transient directing group strategy has been demonstrated in moderate to good yields with commendable enantioselectivities. The newly synthesized chiral fluorophores exhibit favorable photophysical properties, including large Stokes shifts, good fluorescence quantum yields, aggregation-induced emission in aqueous