线性共轭乙炔酮1,3,5-二芳基戊-4-烯-2-炔-1-酮已在三氟甲基磺酸CF 3 SO 3 H中环化为2,6-二芳基-2,3-二氢吡喃-4-酮这些烯酮与CF 3 SO 3 H中的芳烃的反应提供了乙炔键1,3,5-三芳基戊-2,4-二烯-1-酮的氢芳基化产物,这些环进一步被环化成3-芳基-3-氧代亚丙基茚满。
Direct Transformation of Terminal Alkynes into Amidines by a Silver-Catalyzed Four-Component Reaction
作者:Binbin Liu、Yongquan Ning、Matteo Virelli、Giuseppe Zanoni、Edward A. Anderson、Xihe Bi
DOI:10.1021/jacs.8b11039
日期:2019.1.30
An unprecedented conversion of terminal alkynes into N-sulfonimidamides (amidines) is reported by a silver-catalyzed, one-pot, four-component reaction with TMSN3, sodium sulfinate, and sulfonylazide. The reaction scope includes both aromatic and aliphatic alkynes. A possible cascade reaction mechanism, consisting of alkyne hydroazidation, sulfonyl radical addition, 1,3-dipolar cycloaddition by TMSN3
Asymmetric Enynylation of<i>N</i>-Sulfonyl Aldimines Catalyzed by Zn-BINOL Complexes
作者:Zhen-Yan Yang、Tian-Lin Liu、Yan Zheng、Shen Li、Jun-An Ma
DOI:10.1002/ejoc.201500400
日期:2015.6
An efficient enynylation of N-sulfonyl aldimines is described herein. In the presence of Zn-BINOLcomplexes, catalytic enantioselective addition reactions of terminal 3-en-1-ynes to N-sulfonyl aldimines proceed smoothly to produce enynylated carbinamines in up to 96 % yield and 95 % ee. The adducts are versatile synthetic intermediates that readily undergo Pauson–Khand cycloaddition reactions to give
Iron-Catalyzed Regio- and Stereoselective Hydrosilylation of 1,3-Enynes To Access 1,3-Dienylsilanes
作者:Zhihao Guo、Huanan Wen、Guixia Liu、Zheng Huang
DOI:10.1021/acs.orglett.1c00670
日期:2021.3.19
A regio- and stereoselectivehydrosilylation of 1,3-enynes with primary and secondary silanes to access 1,3-dienylsilanes is accomplished by employing an iron precatalyst bearing iminopyridine-oxazoline (IPO) ligand. The hydrosilylation proceeds via syn-addition of a Si–H bond to the alkyne group of 1,3-enynes, incorporating the silyl group at the site proximal to the alkene. The reaction features
Zinc-mediated enantioselective addition of terminal 3-en-1-ynes to cyclic trifluoromethyl ketimines
作者:Yue Zhang、Jing Nie、Fa-Guang Zhang、Jun-An Ma
DOI:10.1016/j.jfluchem.2018.01.008
日期:2018.4
A facile enantioselectiveaddition of terminal 3-en-1-ynes to cyclic N-acyl trifluoromethyl ketimines is reported. In the presence of Zinc/BINOL complexes, a series of enynylated tertiary carbinamines were readily obtained in 90–97% yield with 70–97% enantiomeric excess in a single chemical operation under mild reaction conditions.
using SF5Cl has been developed. The regioselectivity is dictated by the structural and substitution patterns of 1,3-enynes, enabling facile access to three classes of SF5-containing products: propargylic chlorides, 1,3-dienes, and allenes. The reaction systems involve radical species, where the transfer of a chlorine atom from SF5Cl to a carbon radical is considered the predominant pathway. Diverse types
已开发出使用 SF 5 Cl 的铜催化 1,3-烯炔区域发散型氯五氟磺酰化策略。区域选择性由 1,3-烯炔的结构和取代模式决定,从而能够轻松获得三类含 SF 5的产品:炔丙基氯、1,3-二烯和丙二烯。反应系统涉及自由基物质,其中氯原子从 SF 5 Cl 转移到碳自由基被认为是主要途径。通过简单的官能团转换可以合成不同类型的 SF 5 - 结构单元。