Diastereoselective synthesis of trans-1,2-disubstituted cyclopropanols from homoallyl or bis-homoallyl esters via tandem intramolecular nucleophilic acyl substitution and intramolecular carbonyl addition reactions mediated by Ti(OPr-i)4 / 2 i-PrMgBr reagent
作者:Aleksandr Kasatkin、Fumie Sato
DOI:10.1016/0040-4039(95)01208-y
日期:1995.8
Reactions of homoallyl or bis-homoallyl esters with Ti(OPr-i)4/2 i-PrMgBr reagent resulted in intramolecular nucleophilic acyl substitution reaction and successive intramolecular carbonyladdition reaction providing trans-1,2-disubstituted cyclopropanols stereoselectively in excellent yields.
One Pot Synthesis of Acetylated Homoallyl Alcohols
作者:S. Chandrasekhar、Pradyumna K. Mohanty、Abbas Raza
DOI:10.1080/00397919908085765
日期:1999.1
Abstract An efficient one pot procedure for the preparation of acetylated homoallylalcohols mediated by TaCl5 is described.
摘要 描述了一种由 TaCl5 介导的有效的一锅法制备乙酰化高烯丙醇。
Acetal compound, polymer, resist composition and patterning response
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US20020132970A1
公开(公告)日:2002-09-19
Acetal compounds in which a 5- or 6-membered ring acetal structure is connected to a norbornene structure through a linker represented by —(CH
2
)
m
— in which one hydrogen atom may be substituted with a hydroxyl or acetoxy group, and m is from 1 to 8 are novel. Using the acetal compounds as a monomer, polymers are obtained. A resist composition comprising the polymer as a base resin is sensitive to high-energy radiation and has excellent sensitivity, resolution, and etching resistance.