Iridium-Catalyzed, Regio- and Enantioselective Allylic Substitution with Aromatic and Aliphatic Sulfinates
作者:Mitsuhiro Ueda、John F. Hartwig
DOI:10.1021/ol9023248
日期:2010.1.1
The iridium-catalyzed allylation of sodium sulfinate to form branched allylic sulfones is reported. The reactions between various sodium sulfinates and achiral allylic carbonates occur in good yields, with high selectivity for the branched isomer, and high enantioselectivities (up to 98% ee).
A highlyregio- and enantioselective hydrosulfonylation using commercially available sodium sulfinates is reported, providing the first direct asymmetric rhodium-catalyzed hydrosulfonylation of allenes/alkynes to synthesize chiral allylic sulfones. Ligand screening studies demonstrated the indispensable role of the C1-symmetric P,N-ligand (Rax,S,S)-StackPhim for achieving both high regioselecitivity
据报道,使用市售亚磺酸钠进行高度区域和对映选择性氢磺酰化,提供了第一个直接不对称铑催化的丙二烯/炔烃氢磺酰化,以合成手性烯丙砜。配体筛选研究证明了C 1 -对称 P,N-配体 ( R ax , S , S )-StackPhim 对于实现高区域选择性 (>20:1) 和对映选择性 (高达 97% ee) 的不可或缺的作用。值得注意的是,操作简单的方法和温和的条件允许快速制备具有广泛官能团的手性烯丙基砜。此外,使用叔丁基二甲基甲硅烷氧基甲亚磺酸钠可以在受保护的羟甲基产物的简单转化后集体合成各种手性砜衍生物。
Rhodium-Catalyzed Regio- and Enantioselective Allylic Sulfonylation from Sulfonyl Hydrazides
作者:Sajid Ur Rehman、Changkun Li
DOI:10.1021/acs.orglett.3c01124
日期:2023.5.26
Asymmetric Rhodium-Catalyzed Addition of Thiols to Allenes: Synthesis of Branched Allylic Thioethers and Sulfones
作者:Adrian B. Pritzius、Bernhard Breit
DOI:10.1002/anie.201411402
日期:2015.3.2
hydrothiolation of terminal allenes, a reaction which fulfills the criteria of atom economy, is reported. Applying two chiral rhodium catalyst systems, a wide variety of thiols and allenes could be coupled. Oxidation gave access to the corresponding allylic sulfones in essentially enantiomerically pure form. The reaction tolerates a variety of functional groups and labeling experiments gave first insights into the