A new and general method of iodine-mediated cyclization reactions of unsaturated carbamates, ureas and amides which gives N-cyclized products as a single regio-isomer was achieved. The present reaction proceeds in good yield through regio-control of an ambidentnucleophile by LiAl(Ot-Bu)4, and the regio-control (N-attack vs O-attack) was also found to be remarkably affected by the additive employed
A new and general method of iodine-mediated cyclization reactions of allyl or homoallyl carbamates, ureas, and amides was found to give N-cyclized products as single regioisomers. The present reaction proceeded in good yield through regiocontrol (N-cyclization > O-cyclization) and the increase in the reactivity of an ambident nucleophile by a basic metallic reagent. The N-cyclization selectivity was
NOVEL ENEDIYNE QUINONE IMINES AND METHODS OF PREPARATION AND USE THEREOF
申请人:Sloan-Kettering Institute For Cancer Research
公开号:EP0793497A1
公开(公告)日:1997-09-10
EP0793497A4
申请人:——
公开号:EP0793497A4
公开(公告)日:1998-01-28
COLORED CURABLE COMPOSITION, COLOR FILTER AND SOLID-STATE IMAGING DEVICE
申请人:Shimada Kazuto
公开号:US20110017962A1
公开(公告)日:2011-01-27
A colored curable composition including: (A) a pigment dispersion containing (a-1) a pigment, (a-2) a compound having a pigment mother nucleus structure and an amino group in a molecule, and (a-3) a resin having an acid group and a polymerizable group; (B) an oxime ester initiator; and (C) a polymerizable compound.