C2-未取代的外消旋萘基吲哚与邻炔基萘酚的有机催化不对称反应用于合成连接到轴向手性萘基吲哚单元的轴向手性苯乙烯。利用手性磷酸作为催化剂,这些轴向手性苯乙烯以良好的产率(高达 96%)和出色的立体选择性(高达 >99.9% ee、>20:1 dr 和 >99:1 E / Z )在温和的条件。此外,以高产率和出色的立体控制实现了进一步的合成转化。
The first hydroboration of an 1-alkynylamide—the electronically modulated variant of an ynamine—is described. This hydroboration in combination with a Suzuki–Miyaura cross-coupling reaction with aryl bromides or aryl iodides allows a flexible synthesis of (E)-β-arylenamides and 3-(2′-amidovinyl)indoles with high degree of molecular diversity.
Efficient copper-catalyzedtrifluoromethylation of aromatic iodides was achieved with TMSCF3 in the presence of trimethylborate. The Lewis acid was used to anchor the in situ generated trifluoromethyl anion and suppress its rapid decomposition. Broad applicability of the new trifluoromethylating reaction was demonstrated in the functionalization of different aromatic and heteroaromatic iodides.
Domino C–H functionalization reactions of gem-dibromoolefins: synthesis of N-fused benzo[c]carbazoles
作者:Richard Y. Huang、Patrick T. Franke、Norman Nicolaus、Mark Lautens
DOI:10.1016/j.tet.2013.01.001
日期:2013.6
A palladium-catalyzed domino transformation of gem-dibromoolefins leading to novel polycyclic benzo[c]carbazoles is described. A unique feature of the current reaction is the participation of both bromides in C–H functionalization processes. Mechanistic studies were conducted to ascertain the sequence of reaction events, and the results indicate that the (Z)-bromide likely reacts in preference to the
描述了钯-催化的宝石-二溴烯烃的多米诺转化,其导致了新型的多环苯并[ c ]咔唑。当前反应的一个独特特征是两种溴化物都参与了CH的H官能化过程。进行了机理研究以确定反应事件的顺序,结果表明(Z)-溴化物可能优先于(E)-溴化物反应。
One-Pot Synthesis of Diazine-Bridged Bisindoles and Concise Synthesis of the Marine Alkaloid Hyrtinadine A
作者:Boris O. A. Tasch、Eugen Merkul、Thomas J. J. Müller
DOI:10.1002/ejoc.201100680
日期:2011.8
N-Boc-protected 3-iodoindoles and 3-iodo-7-azaindole in a pseudo three-component reaction involving a one-potMasudaborylation–Suzukiarylationsequence. Some of the title compounds display promising cytotoxic properties. The versatility of this methodology is illustrated by a very concise total synthesis of the marine alkaloid hyrtinadine A.
Construction of Cyclopenta[<i>b</i>]indol-1-ones by a Tandem Gold(I)-Catalyzed Rearrangement/Nazarov Reaction and Application to the Synthesis of Bruceolline H
作者:Dina Scarpi、Martina Petrović、Béla Fiser、Enrique Gómez-Bengoa、Ernesto G. Occhiato
DOI:10.1021/acs.orglett.6b01990
日期:2016.8.5
A tandemgold(I)-catalyzed rearrangement/Nazarov reaction of enynyl acetates which efficiently provides cyclopenta[b]indol-1-ones as useful precursors for the synthesis of natural and bioactive compounds is described. The synthetic potential of the methodology is demonstrated by the first total synthesis of bruceolline H.
描述了串联的金(I)催化的乙酸烯丙酯的重排/纳扎罗夫反应,其有效提供环戊[ b ]吲哚-1-酮作为有用的前体,用于合成天然和生物活性化合物。该方法的合成潜力通过首次合并布鲁索醇H来证明。