One-pot synthesis of sulfonyl (E)-stilbenes by nitrobenzene-mediated dimerizative desulfonation of benzylic sulfones
摘要:
A facile one-pot synthetic route for preparing sulfonyl (E)-stilbenes 4 is developed. The efficient route is realized by a nitrobenzene (PhNO2)-mediated dimerizative desulfonation of benzylic sulfones 3 in the presence of sodium hydride (NaH) in good yields. Some synthetic investigations of sulfonyl stilbenes 4 are also examined. (C) 2014 Elsevier Ltd. All rights reserved.
Photoinduced Synthesis of Bis‐Sulfonyl γ‐Arylated Ketones via DMAP/DDQ‐Mediated Stereogenic Conjugated Addition of α‐Sulfonyl Chalcones with Benzylic Sulfones
作者:Nai‐Chen Hsueh、Meng‐Yang Chang
DOI:10.1002/adsc.202201347
日期:2023.2.21
The DMAP/DDQ-mediated stereochemical conjugated addition of sulfonyl chalcones and benzylic sulfones under photolytic irradiation produces diverse bis-sulfonyl γ-arylated ketones with three contiguous stereogenic centers in a yield of 79%–92%. Herein, a plausible mechanism is proposed and discussed.
Described here is the R3P/ICH2CH2I-promoted dehydroxylativesulfonylation of alcohols with a variety of sulfinates. In contrast to previous dehydroxylativesulfonylation methods, which are usually limited to active alcohols, such as benzyl, allyl, and propargyl alcohols, our protocol can be extended to both active and inactive alcohols (alkyl alcohols). Various sulfonyl groups can be incorporated,
此处描述的是 R 3 P/ICH 2 CH 2 I 促进的醇与各种亚磺酸盐的脱羟基磺酰化反应。与以前的脱羟基磺酰化方法通常仅限于活性醇(如苯甲基醇、烯丙基醇和炔丙醇)相比,我们的方案可以扩展到活性醇和非活性醇(烷基醇)。可以并入各种磺酰基,例如CF 3 SO 2和HCF 2 SO 2,它们是药物化学中感兴趣的氟化基团,其安装受到越来越多的关注。值得注意的是,所有试剂都很便宜且广泛可用,并且在 15 分钟的反应时间内获得了中等到高产率。
Cobalt-Catalyzed Reductive Deoxygenation of Aldehydes, Ketones, Alcohols, and Ethers to Alkanes
作者:Anurag Kumar、Sandip Pattanaik、Gaurav Joshi、Manas Kumar Sahu、Eluvathingal D. Jemmis、Chidambaram Gunanathan
DOI:10.1021/acscatal.3c05666
日期:2024.3.15
species carry out the hydrosilylation of carbonyl compounds, dehydrosilylation of alcohols, and hydrosilanolysis of ethers, resulting in common arylmethylsilyl or alkylsilyl ether intermediates. Further, the reaction of diethylsilane with arylmethylsilyl or alkylsilyl ether leads to deoxygenation and the formation of siloxane oligomers. Further, a DFT study reveals closely lying singlet–triplet electronic
Synthesis of diarylcyclopropyl spirocyclic ketones
作者:Meng-Yang Chang、Chieh-Kai Chan、Yi-Chia Chen
DOI:10.1016/j.tet.2014.02.056
日期:2014.4
A facile one-pot synthetic route for preparing a series of functionalized diarylcyclopropyl spirocyclic ketones 4 is developed. The efficient cyclopropanation route of the conjugated cyclic ketones 2 with sulfones 1 in the presence of NaH shows interesting molecular diversities. The reaction mechanism of the stereocontrolled cyclopropanations has been discussed. (C) 2014 Elsevier Ltd. All rights reserved.
Visible-Light-Catalyzed in Situ Denitrogenative Sulfonylation of Sulfonylhydrazones