A mild and odorless copper-catalyzed thiolation of terminal alkynes with thiosulfonates is described. The broad substrate scope provides convenient access to a wide variety of sulfur-containing heterocycles. In particular, divergent benzoheteroles are efficiently prepared in a simple manner by thiolation of ethynylbenzenes bearing ortho-nucleophilic functional groups followed by iodocyclization.
Enantiocontrolled Connective Synthesis of Allenes by Carbenoid Eliminative Cross-Coupling between α-(Methylthio)vinylcuprate Species and α-(Carbamoyloxy)alkylboronates
作者:Paul R. Blakemore、Yang Cao
DOI:10.1055/a-2072-2882
日期:2023.11
A convenient enantiocontrolled synthesis of allenes (R1R2C=C=CHR3, R1 = aryl/alkyl, R2, R3 = alkyl) is described based on carbenoid eliminative cross-coupling (CEXC) between geometrically pure higher-order α-(methylthio)vinylcuprates, generated in situ by carbocupration of thioalkynes (then activation by addition of n-BuLi), and enantioenriched α-(carbamoyloxy)alkylboronates (15 examples, 30–78% yield
丙二烯(R 1 R 2 C=C=CHR 3,R 1 = 芳基/烷基,R 2,R 3 = 烷基)的简便对映控制合成基于几何纯高分子之间的卡宾消除交叉偶联 (CEX C ) 进行了描述-order α-(甲硫基)乙烯基铜酸盐,通过硫代炔烃的碳化铜化原位生成(然后通过添加n -BuLi活化)和富含对映体的 α-(氨基甲酰氧基)烷基硼酸盐(15 个实例,30-78% 产率,15-95% ee ). 该 CEX C过程的立体化学保真度依赖于底物,这种现象暂时归因于推定的有机铜介导的丙二烯外消旋化途径。
Hydroformylation of Alkynyl Sulfides: A Stereo‐ and Regioselective Route to α‐Sulfenyl Acroleins
作者:Patrick Wagner、Mihaela Gulea、Nicolas Girard
DOI:10.1002/adsc.202301349
日期:2024.3.19
sulfides. Additionally, one can take advantage of the possibility of the sulfur oxidation to obtain an alkenyl sulfoxide or sulfone, and so altering the electronic behavior of the carbon-carbon double bond. So far, the synthesis of α-sulfanyl acroleins (Scheme 1) is mainly based on general methods involving the incorporation of the sulfur function into an α,β-unsaturated aldehyde as a nucleophile (Scheme 1
A stereoselective synthesis of α-halo vinyl sulfides and their applications in organic synthesis
作者:Mei Su、Wensheng Yu、Zhendong Jin
DOI:10.1016/s0040-4039(01)00556-1
日期:2001.6
alpha -Halo vinyl sulfides have been synthesized stereoselectively via the addition of the in situ! generated hydrogen halide to acetylenic thioether. alpha -Halo vinyl sulfides are versatile substrates that can undergo many important transformations. (C) 2001 Elsevier Science Ltd. All rights reserved.
FeCl<sub>3</sub>-Catalyzed Synthesis of Tanshinlactone Analogues from 1<i>H</i>-Indene-1,2,3-triones and Alkynes