Synthesis of Indolo-1,2-Benzothiazines from Sulfoximines and 3-Diazoindolin-2-imines
作者:Gi Hoon Ko、Jeong-Yu Son、Hyunseok Kim、Chanyoung Maeng、Yonghyeon Baek、Boram Seo、Kyusik Um、Phil Ho Lee
DOI:10.1002/adsc.201700764
日期:2017.10.4
A rhodium‐catalyzed cyclization reaction of sulfoximines with 3‐diazoindolin‐2‐imines is described. This protocol provides a wide range of indolo‐1,2‐benzothiazines in moderate to excellent yields together with the release of molecular nitrogen and p‐toluenesulfonamide. The present method involves the N–H/C–H activation of S‐aryl sulfoximines and has the advantages of a broad substrate scope.
cross-coupling strategy for the preparation of novel sulfoximines via preformed sulfoximidoyl-containing buildingblocks has been developed. It allows obtaining a wide range of products in good yields under mild reaction conditions, and it can be applied in late-stage functionalizations, as demonstrated by the synthesis of a sulfoximine-based analogue of a recently reported potent valosine-containing protein inhibitor
Rh(<scp>iii</scp>)-catalysed C–H/C–H cross-coupling of <i>S</i>-aryl sulfoximines with thiophenes: facile access to [1]benzothieno[3,2-<i>b</i>][1]benzothiophene (BTBT) and benzothiazines
作者:Chengyong Yang、Zheng Liu、Rui Cheng、Jiping Du、Chunhao Ran、Di Wu、Jingbo Lan
DOI:10.1039/d2cc02232j
日期:——
rhodium-catalysed oxidative C–H/C–H cross-coupling of S-aryl sulfoximines with thiophenes via a chelation-assisted strategy, which provides an efficient approach for the construction of [1]benzothieno[3,2-b][1]benzothiophene (BTBT) and benzothiazine skeletons from easily available substrates. This protocol exhibits a good compatibility with halogen substituents, thus paving the way for further transformation to prepare
本文报道了铑催化的氧化 C-H/C-H通过螯合辅助策略将S-芳基亚砜亚胺与噻吩交叉偶联,这为构建 [1] 苯并噻吩[3,2- b ][1]苯并噻吩(BTBT)和苯并噻嗪骨架来自容易获得的底物。该方案与卤素取代基具有良好的相容性,为进一步转化制备各种有机功能分子铺平了道路。得到的苯并噻嗪衍生物显示出深蓝色发射,国际照明委员会 (CIE) 坐标为 (0.15, 0.04)、高量子产率和延迟的荧光寿命。
Iridium(III)-Catalyzed C–H Cyclization of Sulfoximines with Diazo Meldrum’s Acids for the Synthesis of Cyclic Sulfoximines
作者:Gi Uk Han、Suhui Kim、Sang Hoon Han、Chanyoung Maeng、Gi Hoon Ko、Kyungsup Lee、Hee Chan Noh、Phil Ho Lee
DOI:10.1021/acs.joc.3c00984
日期:2023.8.18
Iridium(III)-catalyzedC–H cyclization of sulfoximines with diazo Meldrum’s acid provided cyclic sulfoximines with a carbonyl group in good to excellent yields. These compounds were easily converted into unsubstituted and arylated sulfoximines. Moreover, the vinyl triflates obtained from the cyclic sulfoximines underwent palladium(II)-catalyzed cross-coupling reactions with a variety of aryl, arylalkynyl
benzoisothiazole spiropyrrolidinediones using sulfoximine as a directing group under a C–H activation and [4 + 1] annulation strategy with maleimides as a coupling partner is reported. The cyclizationreaction was compatible with various substituted sulfoximine and maleimides. The deuterium-labeling studies were performed to investigate the mechanism of the reaction.