A direct Csp3–H bond oxidative thioesterification of methyl ketones with aromatic thiols/disulfides promoted by TBAI/K2S2O8 has been developed. The reaction provides successfully a simple and efficientmethod for the synthesis of functionalized α-ketothioesters of aromatic thiols. This practical methodology exhibits readily available starting materials, large-scale applicability, synthetic application
已经开发了由TBAI / K 2 S 2 O 8促进的甲基酮与芳族硫醇/二硫化物的直接C sp3- H键氧化硫酯化反应。该反应成功地提供了一种简单而有效的方法来合成芳族硫醇的官能化α-酮硫酯。这种实用的方法论展示了容易获得的起始原料,大规模的适用性,合成的应用以及广泛的官能团耐受性。提出了一种可能的转换机制。
CuI‐catalyzed direct synthesis of diaryl thioethers from aryl boronic acids and arylsulfonyl chlorides
作者:Keke Huang、Min Yang、Xiao‐Jing Lai、Xin Hu、Guanyinsheng Qiu、Jin‐Biao Liu
DOI:10.1002/aoc.5385
日期:2020.2
A CuI‐catalyzed direct coupling of arylboronicacids with arylsulfonyl chlorides for the preparation of diaryl thioethers was developed. The reaction is initiated by a PPh3 reduction of the arylsulfonyl chloride, followed by a CuI‐catalyzed C–S coupling with an arylboronicacid. Various arylsulfonyl chlorides can directly serve as a sulfur source in this mild and efficient reaction giving the desired
carbonyl compounds has been achieved via the halogen-free Cs2CO3-promoted cross-dehydrogenative coupling (CDC) of thiophenols with activemethylenecompounds using air as the oxidant under mild conditions. This transformation provides a straightforward route to the construction of carbon–sulfur bonds with wide functional group compatibility, which produces α-sulfenylated carbonyl compounds in up to
通过在温和的条件下使用空气作为氧化剂,通过无卤素的Cs 2 CO 3促进的硫酚与活性亚甲基化合物的交叉脱氢偶联(CDC),实现了羰基化合物的便捷,有效的α-亚磺酰基化。这种转变为构建具有广泛官能团相容性的碳硫键提供了一条简单的途径,该路线可产生高达95%的产率的α-亚磺酰化羰基化合物。
Iodine-catalyzed C–H/S–H oxidative coupling: from 1,3-diketones and thiophenols to β-dicarbonyl thioethers
作者:Hao Cao、Jiwen Yuan、Chao Liu、Xinquan Hu、Aiwen Lei
DOI:10.1039/c5ra04906g
日期:——
A novel I2-catalyzed Csp3-H/S–H oxidative coupling between alkyl 1,3-diketones and thiophenols to form β-carbonyl thioethers was demonstrated.
In the presence of carbon tetrabromide, a variety of dithiocarbamates, xanthates, dithioesters, and thioethers were prepared in one pot by reacting the corresponding dithioic acids or thiols with active methylene compounds/indole derivatives under mild conditions. The formation of a sulfenyl bromide intermediate is proposed as the key step, which initiates the C-S bond formation.