通过一锅S N 2'烯丙基化-Wittig策略从磷鎓叶立德,烯丙基碳酸酯和醛中无催化剂地合成烷基二烯
摘要:
提出了通过区域选择性的S N 2'方法将稳定的磷化磷与烯丙基碳酸酯进行无催化剂的烯丙基烷基化反应。随后的与脂肪族和芳香族醛以及乙烯酮的一锅Wittig反应可提供结构多样的跳跃式二烯(1,4-二烯),且产率高,并且具有灵活的取代基图案,具有中等至出色的立体选择性。这种单锅S N 2'烯丙基化-维蒂希(Wittig)策略构成了一种方便有效的合成方法,用于从容易获得的起始原料中高度官能化的二烯。
this study, the synthesis of acrylamide derivatives and their pharmaco‐toxicological evaluation as potential inhibitors of NLRP3‐dependent events was undertaken. Five hits were identified and evaluated for their efficiency in inhibiting IL‐1β release from different macrophage subtypes, including CAPS mutant macrophages. The most attractive hits were tested for their ability to inhibit NLRP3 ATPase activity
Regioselective S<sub>N</sub>2' Mitsunobu reaction of Morita–Baylis–Hillman alcohols: A facile and stereoselective synthesis of α-alkylidene-β-hydrazino acid derivatives
作者:Silong Xu、Jian Shang、Junjie Zhang、Yuhai Tang
DOI:10.3762/bjoc.10.98
日期:——
regioselective SN2' Mitsunobu reaction between Morita-Baylis-Hillman (MBH) alcohols, azodicarboxylates, and triphenylphosphine is developed, which provides an easy access to alpha-alkylidene-beta-hydrazino acid derivatives in high yields and good stereoselectivity. This reaction represents the first direct transformation of MBH alcohols into hydrazines.
Rate Acceleration of the Baylis−Hillman Reaction in Polar Solvents (Water and Formamide). Dominant Role of Hydrogen Bonding, Not Hydrophobic Effects, Is Implicated
作者:Varinder K. Aggarwal、David K. Dean、Andrea Mereu、Richard Williams
DOI:10.1021/jo016073y
日期:2002.1.1
A substantial acceleration of the Baylis-Hillmanreaction between cyclohexenone and benzaldehyde has been observed when the reaction is conducted in water. Several different amine catalysts were tested, and as with reactions conducted in the absence of solvent, 3-hydroxyquinuclidine was found to be the optimum catalyst in terms of rate. The reaction has been extended to other aldehyde electrophiles
Fe(III)-Catalyzed Hydroallylation of Unactivated Alkenes with Morita–Baylis–Hillman Adducts
作者:Jifeng Qi、Jing Zheng、Sunliang Cui
DOI:10.1021/acs.orglett.8b00108
日期:2018.3.2
An Fe(III)-catalyzed hydroallylation of unactivated alkenes with Morita–Baylis–Hillman adducts via an Fe-catalyzed process is described. A variety of alkenes, including mono-, di-, and trisubstituted alkenes, could all smoothly convert to structural diversified cinnamates in this protocol. Interestingly, when the hydroxyl-containing alkenes were used, various lactones could be rapidly assembled. Moreover
Herein, we report an atom-economical and environmentally benign approach for P–Cbond construction via C–OH/P–H dehydrative cross-coupling reaction. This reaction was carried out under metal-free conditions, proceeds in the absence of any solvent and delivered allylic phosphorus compounds in high yields with wide functional group tolerance.