我们在本文中报道了在外部碱和羟基活化剂存在下由氨基醇和二氧化碳合成环状氨基甲酸酯的简单通用方法。利用对甲苯磺酰氯(TsCl),该反应在温和的条件下进行,该方法完全适用于制备各种高附加值的5-和6-元环以及双环稠合的氨基甲酸酯。DFT计算和实验结果表明具有高区域选择性,化学选择性和立体选择性的S N 2型反应机理。
HYDANTOIN DERIVATIVES USEFUL AS ANTIBACTERIAL AGENTS
申请人:Mansoor Umar Faruk
公开号:US20080226618A1
公开(公告)日:2008-09-18
This invention relates to compounds of the Formula (I),
or a pharmaceutically acceptable salt, solvate, ester or isomer thereof, which is useful for the treatment of diseases or conditions mediated by LpxC.
US7998961B2
申请人:——
公开号:US7998961B2
公开(公告)日:2011-08-16
Carbon dioxide-based facile synthesis of cyclic carbamates from amino alcohols
作者:Teemu Niemi、Israel Fernández、Bethany Steadman、Jere K. Mannisto、Timo Repo
DOI:10.1039/c8cc00636a
日期:——
for the synthesis of cyclic carbamatesfromaminoalcohols and carbon dioxide in the presence of an external base and a hydroxyl group activating reagent. Utilizing p-toluenesulfonyl chloride (TsCl), the reaction proceeds under mild conditions, and the approach is fully applicable to the preparation of various high value-added 5- and 6-membered rings as well as bicyclic fused ring carbamates. DFT calculations
我们在本文中报道了在外部碱和羟基活化剂存在下由氨基醇和二氧化碳合成环状氨基甲酸酯的简单通用方法。利用对甲苯磺酰氯(TsCl),该反应在温和的条件下进行,该方法完全适用于制备各种高附加值的5-和6-元环以及双环稠合的氨基甲酸酯。DFT计算和实验结果表明具有高区域选择性,化学选择性和立体选择性的S N 2型反应机理。
A solvent free method for preparation of β-amino alcohols by ring opening of epoxides with amines using MCM-22 as a catalyst
β-amino alcohols were synthesized at room temperature employing microporous MCM-22 zeolite as catalyst in an eco-friendly manner without using solvent. The zeolite MCM-22 showed promising activity for the conversion of primary and secondary amines into β-amino alcohols under mild reaction conditions. The catalytic activity remains intact for three recycles.