已经描述了N 1-H-1,2,3-三唑的直接开环/亲核取代反应。发散的 ( Z )-β-卤素或磺酰基取代的烯酰胺可以以可调的方式立体定向合成。这种策略不仅可以在非金属催化和温和的反应条件下实现N 1-H-1,2,3-三唑的新开环方法,而且还为可靠地获得多功能 ( Z )-β-取代的烯酰胺提供了良好的机会可用作进一步合成转化的合成前体。
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.
A new procedure for the stereoselective synthesis of syn alpha-amino beta-oxy ketones is reported. It consists of two steps; in the first step, alpha-amino silyl enol ethers having a (Z) geometry are prepared from 1-alkynes via 1-sulfonyl-1,2,3-triazoles. In the second step, the silyl enol ethers undergo the TiCl4-mediated Mukaiyama aldolreaction with aldehydes to produce alpha-amino beta-oxy ketones
Synthesis of α-methylene-δ-oxo-γ-amino esters via Rh(<scp>ii</scp>)-catalyzed coupling of 1-sulfonyl-1,2,3-triazoles with Morita–Baylis–Hillman adducts
作者:Hyun Ji Jeon、Mi Soo Kwak、Da Jung Jung、Jean Bouffard、Sang-gi Lee
DOI:10.1039/c6ob02086k
日期:——
1-alkynes and sulfonyl azides, with Morita–Baylis–Hillman (MBH) adducts afforded highly functionalized α-methylene-δ-oxo-γ-amino esters in excellent yields with broad functional group tolerance. This transformation can also be successfully accomplished as a multicomponent all-in-one-pot reaction of 1-alkynes, sulfonyl azides and MBH adducts in the presence of Cu(I) and Rh(II) catalysts.
<i>N</i>
<sup>2</sup>
-Selective Autocatalytic Ditriazolylation Reactions of Cyclopropenones and Tropone with <i>N</i>
<sup>1</sup>
-Sulfonyl-1,2,3-triazoles
作者:Long-Hai Li、Yu Jiang、Jian Hao、Yin Wei、Min Shi
DOI:10.1002/adsc.201700936
日期:2017.10.4
N2‐Selective autocatalytic ditriazolylation reactions of cyclopropenones and tropone with N1‐sulfonyl‐1,2,3‐triazoles are reported for the first time. In contrast to previous methods for preparing N2‐substituted bis(1,2,3‐triazolyl) compounds, the present reaction achieved ditriazolylation in one step under simple and user‐friendly conditions with a wide substrate scope. A plausible mechanism has been
Cooperative Pd(0)/Rh(II) Dual Catalysis: Interceptive Capturing of π-Allyl Pd(II) Complexes with α-Imino Rh(II) Carbenoids
作者:Zi-Sheng Chen、Liang-Zhu Huang、Hyun Ji Jeon、Zi Xuan、Sang-gi Lee
DOI:10.1021/acscatal.6b01110
日期:2016.8.5
catalysis, redox-compatible Pd(0) and Rh(II) catalysts selectively activate allylic substrates and N-sulfonyl-1,2,3-triazoles to generate π-allyl Pd(II) complexes and 1,3-ambivalent equivalent α-imino Rh(II) carbenoid intermediates, respectively. The counteranion of the π-allyl Pd(II) complex acts as a nucleophile transferring to the electrophilic carbenic carbon to form Pd/Rh-associated zwitterionic