Copper‐Catalyzed Enantioselective Construction of Tertiary Propargylic Sulfones
作者:José Enrique Gómez、Àlex Cristòfol、Arjan W. Kleij
DOI:10.1002/anie.201814242
日期:2019.3.18
asymmetric synthesis approach has been developed. We disclose a versatile copper‐catalyzed sulfonylation of propargylic cyclic carbonates using sodium sulfinates that allows the construction of propargylic sulfones featuring elusive quaternary stereocenters. This method provides the first successful example of such an enantioselective propargylic sulfonylation, features high asymmetric induction, wide functional
Pd-Catalyzed Enantio- and Regioselective Formation of Allylic Aryl Ethers
作者:Jianing Xie、Wusheng Guo、Aijie Cai、Eduardo C. Escudero-Adán、Arjan W. Kleij
DOI:10.1021/acs.orglett.7b03247
日期:2017.12.1
A general methodology for the synthesis of enantioenriched tertiary allylic aryl ethers through Pd-catalyzed decarboxylative reactions of vinyl cyclic carbonates and phenols is presented. Switching of the regioselectivity toward the formation of linear products by a judicious choice of the ligand is also reported.
Leukotriene antagonists for use in the treatment or prevention of alzheimer's disease
申请人:ELI LILLY AND COMPANY
公开号:EP0743064A1
公开(公告)日:1996-11-20
This invention provides methods for the treatment or prevention of Alzheimer's disease which comprises administering to a mammal in need thereof an effective amount of a compound having activity as a leukotriene antagonist.
Copper-Mediated S<sub>N</sub>2′ Allyl–Alkyl and Allyl–Boryl Couplings of Vinyl Cyclic Carbonates
作者:Núria Miralles、José Enrique Gómez、Arjan W. Kleij、Elena Fernández
DOI:10.1021/acs.orglett.7b02947
日期:2017.11.17
for the copper-catalyzed borylmethylation and borylation of vinyl cyclic carbonates through an SN2′ mechanism is reported. These singular reactions involve selective SN2′ allylic substitutions with concomitant ring opening of the cyclic carbonate and with extrusion of CO2 and formation of a useful hydroxyl functionality in a single step. The stereoselectivity of the homoallylic borylation and allylic
报道了一种通过S N 2'机理进行铜催化的乙烯基环状碳酸酯的硼烷基甲基化和硼化的方法。这些奇异反应包括选择性的S N 2'烯丙基取代,伴随有环状碳酸酯的开环,以及CO 2的挤出和在单个步骤中形成有用的羟基官能团。可以控制均烯丙基硼化和烯丙基硼化过程的立体选择性,并且合成上有用的不饱和(E)-戊-2-烯-1,5-二醇和(E)-丁-2-烯-1,4-二醇是访问。
Arylation of α-pivaloxyl ketones with arylboronic reagents via Ni-catalyzed sp3 C–O activation
作者:Kun Huang、Gang Li、Wei-Ping Huang、Da-Gang Yu、Zhang-Jie Shi
DOI:10.1039/c1cc11193k
日期:——
A SuzukiâMiyaura coupling of α-pivaloxyl ketonesviaNi-catalyzed sp3 CâO activation to produce α-aryl ketones is developed. This study offers a convenient method to construct α-arylation products from readily available α-hydroxyl carbonyl compounds.