Enantioselective Total Syntheses of (−)-Palau’amine, (−)-Axinellamines, and (−)-Massadines
作者:Ian B. Seiple、Shun Su、Ian S. Young、Akifumi Nakamura、Junichiro Yamaguchi、Lars Jørgensen、Rodrigo A. Rodriguez、Daniel P. O’Malley、Tanja Gaich、Matthias Köck、Phil S. Baran
DOI:10.1021/ja2047232
日期:2011.9.21
Dimeric pyrrole-imidazole alkaloids represent a rich and topologically unique class of marine natural products. This full account will follow the progression of efforts that culminated in the enantioselective total syntheses of the most structurally ornate members of this family: the axinellamines, the massadines, and palau'amine. A bio-inspired approach capitalizing on the pseudo-symmetry of the members
Enantioselective Diels-Alder Reactions of Carboxylic Ester Dienophiles Catalysed by Titanium-Based Chiral Lewis Acid
作者:Yogesh Choughule、Anand Patwardhan
DOI:10.13005/ojc/320217
日期:2016.4.28
A new titanium-based chiralLewisacid 1 has been developed using (1R,2R)-1,2-bis-(2methoxyphenyl)-ethane-1,2-diol as a chiral vicinal diol ligand. This chiral catalyst was found to exhibit uniformly high enantioselectivity towards carboxylic ester dienophiles in Diels-Alder reactions. The chiral vicinal ligand (1R,2R)-1,2-bis-(2-methoxyphenyl)-ethane-1,2-diol is inexpensive and is easily accessible
Iron-Mediated Photochemical Anti-Markovnikov Hydroazidation of Unactivated Olefins
作者:Henry Lindner、Willi M. Amberg、Erick M. Carreira
DOI:10.1021/jacs.3c09122
日期:2023.10.18
Unactivated olefins are converted to alkyl azides with bench-stable NaN3 in the presence of FeCl3·6H2O under blue-light irradiation. The products are obtained with anti-Markovnikov selectivity, and the reaction can be performed under mild ambient conditions in the presence of air and moisture. The transformation displays broad functional group tolerance, which renders it suitable for functionalization
在蓝光照射下,在 FeCl 3 ·6H 2 O 存在下,未活化的烯烃与实验室稳定的 NaN 3转化为烷基叠氮化物。所得产物具有抗马可夫尼科夫选择性,反应可以在空气和湿气存在的温和环境条件下进行。该转化表现出广泛的官能团耐受性,这使其适合复杂分子的官能化。进行机理研究以深入了解叠氮反应并揭示水合铁中的水作为氢原子源的作用。
Syntheses of isomerically pure reference octalins and hydrindanes
作者:Jun Hee Lee、Woo Han Kim、Samuel J. Danishefsky
DOI:10.1016/j.tetlet.2009.07.068
日期:2009.9
We describe herein the development of efficient and stereoselective synthetic routes to a range of cis- and trans-octalin and hydrindane target compounds. (C) 2009 Elsevier Ltd. All rights reserved.
Petrow; Sopow, Sb. Statei Obshch. Khim., 1953, p. 853,855