已经通过钴 (II) 基金属基催化对 N-双同炔氨磺酰基叠氮化物证明了炔丙 C(sp 3 ) H 键的高度化学选择性分子内胺化。在 D 2h对称酰胺卟啉配体 3,5-Di t Bu-IbuPhyrin 的支持下,钴 (II) 催化的 C H 胺化在中性和非氧化条件下有效进行,无需任何添加剂,并生成 N 2作为唯一的副产品。金属自由基胺化适用于二级和三级炔丙C H 底物具有异常高的官能团耐受性,从而为功能化炔丙胺衍生物的高产合成提供了一种直接方法。
Enantio- and Diastereodivergent Dual Catalysis: α-Allylation of Branched Aldehydes
作者:Simon Krautwald、David Sarlah、Michael A. Schafroth、Erick M. Carreira
DOI:10.1126/science.1237068
日期:2013.5.31
stereocenters in a carbon–carbon bond-forming reaction. [Also see Perspective by Schindler and Jacobsen] An important challenge in asymmetricsynthesis is the development of fully stereodivergent strategies to access the full complement of stereoisomers of products bearingmultiple stereocenters. In the ideal case, where four products are possible, applying distinct catalysts to the same set of starting materials
Base‐Catalysed Intramolecular Hydroamination of Vinyl Sulfides
作者:Coralie Quinet、Laetitia Sampoux、István E. Markó
DOI:10.1002/ejoc.200900009
日期:2009.4
Small amounts of n-butyllithium catalyse the highly efficient hydroamination of a large variety of vinylsulfides. This novel methodology offers an easy access to a wide range of nitrogen heterocycles, including simple pyrrolidines and piperidines, as well as more complex bicyclic compounds. Subsequent transformations of the sulfur group led to the formation of functionalised alkaloid-like substructures
Chemoselective Amination of Propargylic C(sp<sup>3</sup>)H Bonds by Cobalt(II)-Based Metalloradical Catalysis
作者:Hongjian Lu、Chaoqun Li、Huiling Jiang、Christopher L. Lizardi、X. Peter Zhang
DOI:10.1002/anie.201400557
日期:2014.7.1
Highly chemoselective intramolecular amination of propargylic C(sp3)H bonds has been demonstrated for N‐bishomopropargylic sulfamoyl azides through cobalt(II)‐based metalloradical catalysis. Supported by D2h‐symmetric amidoporphyrin ligand 3,5‐DitBu‐IbuPhyrin, the cobalt(II)‐catalyzed CH amination proceeds effectively under neutral and nonoxidative conditions without the need of any additives, and
已经通过钴 (II) 基金属基催化对 N-双同炔氨磺酰基叠氮化物证明了炔丙 C(sp 3 ) H 键的高度化学选择性分子内胺化。在 D 2h对称酰胺卟啉配体 3,5-Di t Bu-IbuPhyrin 的支持下,钴 (II) 催化的 C H 胺化在中性和非氧化条件下有效进行,无需任何添加剂,并生成 N 2作为唯一的副产品。金属自由基胺化适用于二级和三级炔丙C H 底物具有异常高的官能团耐受性,从而为功能化炔丙胺衍生物的高产合成提供了一种直接方法。