Sulfamic Acid as a Cost‐Effective and Recyclable Catalyst for Protection of Carbonyls to Acetals and Ketals Under Mild Conditions
作者:Weizhong Gong、Bo Wang、Yanglong Gu、Liang Yan、Liming Yang、Jishuan Suo
DOI:10.1081/scc-200039314
日期:2004.12.31
Abstract An efficient H2NSO3H‐catalyzed protection of various carbonyl compounds at room temperature was investigated. The features of mild conditions, cost‐efficient catalyst, simple workup, and the recyclability of the catalyst were represented in this process.
Acyclic Stereoselection in the Ortho Ester Claisen Rearrangement
作者:G. William Daub、James P. Edwards、Carol R. Okada、Jana Westran Allen、Claudia Tata Maxey、Matthew S. Wells、Alexandra S. Goldstein、Michael J. Dibley、Clarence J. Wang、Daniel P. Ostercamp、Steven Chung、Paula Shanklin Cunningham、Martin A. Berliner
DOI:10.1021/jo9614250
日期:1997.4.1
The ortho ester Claisen rearrangement of trisubstituted allylicalcohols exhibits significant levels of diastereoselection. In E allylicalcohols, a 1,3-diaxial interaction develops in the chairlike transition state leading to the anti isomer, rendering the reaction syn selective by a factor of 3-5 to 1. In Zallylicalcohols, the 1,3-diaxial interaction develops in the transition state leading to
Substituent effect on the chemical behaviour of some carbonyl compounds and ketals with 1-ethoxy-3-trimethylsilylprop-1-yne
作者:D. Zakarya、A. Rayadh、M. Samih、T. Lakhlifi
DOI:10.1016/0040-4039(94)85065-8
日期:1994.1
In this work, principal component analysis (PCA) was carried out on the basis of property descriptors for a set of carbonyl compounds and ketals. A principal component projection of the points representing the compounds showed that the chemical behaviour of the compounds with 1-ethoxy-3-trimethylsilylprop-1-yne is related to their chemical composition. The obtained structure-chemical behaviour information
A method is provided for producing an aromatic compound, including a step of mixing a compound represented by formula (A) and a compound represented by formula (B):
in the presence of at least one phosphine compound selected from the group consisting of a phosphine represented by formula (C) and a phosphonium salt represented by formula (F):
a base, a palladium compound, and an aprotic organic solvent.
Monomer Compound, Process for Producing the Same, Polymer Thereof, and Water-Based Curable Composition
申请人:Kobata Masami
公开号:US20080053835A1
公开(公告)日:2008-03-06
The present invention provides an α-oxoamide group- and (meth)acryloyloxy group-containing monomer compound represented by Formula (I)
wherein Y is a C
1-6
straight-chain alkylene group which may be substituted with a C
1-6
organic group, R
1
is a C
1-16
organic group, R
2
is a hydrogen atom or a C
1-8
organic group, and R
3
is a hydrogen atom or a methyl group; a production process therefor; a polymer thereof; and an aqueous curable composition containing the polymer.