Copper and Rhodium Relay Catalysis for Selective Access to <i>cis</i>-2,3-Dihydroazepines
作者:You Li、Han Luo、Zongyuan Tang、Yingzi Li、Luan Du、Xiaolan Xin、Shanshan Li、Baosheng Li
DOI:10.1021/acs.orglett.1c02262
日期:2021.8.20
access synthetically challenging cis-2,3-dihydroazepines is reported. The reaction starts with readily available dienals, alkynes, and sulfonyl azides as the substrates and employs copper and rhodium as relay catalysts. Key steps include a copper-catalyzed reaction between an alkyne and a sulfonyl azide to form a triazole intermediate. The subsequent activation of this triazole intermediate by a rhodium
Divergent Synthesis of Highly Substituted Pyridines and Benzenes from Dienals, Alkynes, and Sulfonyl Azides
作者:Han Luo、You Li、Luan Du、Xiaolan Xin、Tao Wang、Jingpeng Han、Yi Tian、Baosheng Li
DOI:10.1021/acs.orglett.1c02900
日期:2021.10.15
Divergent synthesis is extremely important for the highly efficient preparation of structurally diverse target molecules. Herein, we describe a multicomponent cascade reaction, which allows access to highly substituted pyridines and benzenes by combining four individual steps in a one-pot manner from the same set of readily available starting materials. The azepine intermediates were first used as
synergistic catalytic strategy has addressed the great challenge in Mn(I)-catalyzed enantioselective C−C bond coupling. A variety of structurally diverse skipped 1,4-dienes are furnished in synthetically useful yields and good enantioselectivity. This strategy has also been applied for the totalsynthesis of the analogues of (−)-Blepharocalyxin D.
协同催化策略解决了 Mn(I) 催化的对映选择性 C−C 键偶联的巨大挑战。提供了多种结构多样的跳过 1,4-二烯,具有合成上有用的产率和良好的对映选择性。该策略也已应用于 (−)-Blepharocalyxin D 类似物的全合成。
Jutz, Bulletin de la Societe Chimique de France, 1958, vol. 91, p. 1867,1876