Synthesis of Multifunctionalized 2-Carbonylpyrrole by Rhodium-Catalyzed Transannulation of 1-Sulfonyl-1,2,3-triazole with β-Diketone
作者:Wanli Cheng、Yanhua Tang、Ze-Feng Xu、Chuan-Ying Li
DOI:10.1021/acs.orglett.6b03179
日期:2016.12.2
A facile rhodium-catalyzed transannulation of 1-sulfonyl-1,2,3-triazoles with β-diketones was realized, and a series of multisubstituted 2-carbonylpyrroles were synthesized efficiently (up to 94% yield). The protocol features several advantages, such as readily available materials, mild reaction conditions, a concise operating procedure, a broad reaction scope, and excellent regioselectivity when benzoylacetone
Rhodium-Catalyzed Synthesis of 2,5-Epoxybenzo[<i>f</i>][1,4]oxazepines by Tandem Reaction of 1-Sulfonyl-1,2,3-triazoles and Salicylaldehydes
作者:Yinping Shi、Xing Yu、Chuan-Ying Li
DOI:10.1002/ejoc.201500912
日期:2015.9
Readily available 1-sulfonyl-1,2,3-triazoles were converted into α-imino carbenes in the presence of catalytic amounts of rhodium(II) salts. The carbenes underwent a tandemreaction with salicylaldehydes to provide a series of functionalized 2,5-epoxybenzo[f][1,4]oxazepines in high yields.
在催化量的铑 (II) 盐的存在下,容易获得的 1-磺酰基-1,2,3-三唑被转化为 α-亚氨基卡宾。卡宾与水杨醛发生串联反应,以高产率提供一系列功能化的 2,5-环氧苯并 [f][1,4] 氧氮杂。
Synthesis of β-Amino-α,β-unsaturated Ketone Derivatives via Sequential Rhodium-Catalyzed Sulfur Ylide Formation/Rearrangement
作者:Jun He、Zengming Man、Yinping Shi、Chuan-Ying Li
DOI:10.1021/acs.joc.5b00521
日期:2015.5.1
a Rh(II) catalyst and β-(methylthio)-α,β-unsaturated ketones, 1-sulfonyl-1,2,3-triazoles can be converted into functionalized β-amino-α,β-unsaturated ketones via formation of α-imino rhodium carbene/sulfur ylide and subsequent rearrangement. The products decompose to useful 2-methylthiopyrrole derivatives conveniently in high yield.
Synthesis of benzothiazonine by rhodium-catalyzed denitrogenative transannulation of 1-sulfonyl-1,2,3-triazole and thiochromone
作者:Saygbechi T. Jablasone、Zihang Ye、Shengguo Duan、Ze-Feng Xu、Chuan-Ying Li
DOI:10.1039/d1ob00419k
日期:——
A facile synthesis of functionalized benzothiazonine was achieved by rhodium-catalyzed denitrogenative annulation of easily available 1-sulfonyl-1,2,3-triazole and thiochromone.
tryptamine derivativesemploying a combination of alkynes and sulfonyl azides as readily accessible aminoethylating agents. The reaction features a successful integration of copper‐catalyzed alkyne and azide cycloaddition to N‐sulfonyl‐1,2,3‐triazole, rhodium‐catalyzed selective insertion of α‐iminocarbenes onto the C3H bond of indoles, and reduction of the resultant enamides to tryptamine derivatives employing