多米诺骨牌Aza-Piancatelli重排/分子内Diels-Alder反应:Octahydro-1 H -cyclopenta [ cd ]异吲哚的立体选择性合成
摘要:
首次以高度立体选择性的方式开发了一种有效的单锅法,用于构建有角度融合的5-6-5氮杂三环骨架。该多米诺反应是氮杂-Piancatelli重排和分子内Diels-Alder反应的新颖组合,可轻松提供六氢-2a,5-环氧-环戊[ cd ]异吲哚加合物,带有六个连续的立体中心,且收率很高。BBr 3介导的氧杂桥联加合物的裂解导致八氢-1 H-环戊[ cd ]异吲哚的形成,这是gracilamine生物碱的氮杂-三环BCE核心。
A General Palladium-Phosphine Complex To Explore Aryl Tosylates in the N-Arylation of Amines: Scope and Limitations
作者:Pui Ying Choy、Kin Ho Chung、Qingjing Yang、Chau Ming So、Raymond Wai-Yin Sun、Fuk Yee Kwong
DOI:10.1002/asia.201800575
日期:2018.9.4
heterocycles such as indole, carbazole, pyrrole, 10‐phenothiazine, and 10‐phenoxazine were shown to be feasible coupling partners under this catalytic system. The described reaction conditions tolerate a wide range of functional groups and allow an array of aromatic amines as well as unsymmetrical amine products to be easily accessed from the various phenolic derivatives. Interestingly, this catalyst
A porous polymeric ligand (PPL) has been synthesized and complexed with copper to generate a heterogeneous catalyst (Cu@PPL) that has facilitated the efficient C-N coupling with various (hetero)aryl chlorides under mild conditions of visible-light irradiation at 80 °C (58 examples, up to 99% yields). This method could be applied to both aqueous ammonia and substituted amines, and is compatible to a
Palladium-Catalyzed Aminations in Flow ... <i>on Water</i>
作者:Madison J. Wong、Erfan Oftadeh、John M. Saunders、Alex B. Wood、Bruce H. Lipshutz
DOI:10.1021/acscatal.3c05257
日期:2024.2.2
Aminations can be efficiently run, under plug flow conditions on water, catalyzed by low levels of a recyclable palladium precatalyst. General protocols to couple amines, both aryl and aliphatic, with aryl/heteroaryl bromides have been developed. Further highlights include “on water” conditions, short reaction times, recycling of the reaction medium, low levels of residual Pd in the isolated products
在低含量的可回收钯预催化剂的催化下,胺化反应可以在水的活塞流条件下高效进行。已经开发出将芳基胺和脂肪族胺与芳基/杂芳基溴化物偶联的通用方案。进一步的亮点包括“水上”条件、短反应时间、反应介质的回收利用、分离产物中残留 Pd 含量低以及作为绿色指标的低 E 因子,所有这些特征都展示了这种胺化反应通常运行的替代方案在批处理模式下。