Trimethylaluminium mediated amide bond formation in a continuous flow microreactor as key to the synthesis of rimonabant and efaproxiral
作者:Tomas Gustafsson、Fritiof Pontén、Peter H. Seeberger
DOI:10.1039/b719603b
日期:——
A safe, functional-group-tolerant and high-throughput version of the trimethylaluminium mediated amide bond formation reaction has been developed in a microreactor system; rimonabant and efaproxiral were prepared to illustrate the utility of the method.
Practical Synthesis of Amides via Copper/ABNO-Catalyzed Aerobic Oxidative Coupling of Alcohols and Amines
作者:Susan L. Zultanski、Jingyi Zhao、Shannon S. Stahl
DOI:10.1021/jacs.6b03931
日期:2016.5.25
A modular Cu/ABNO catalystsystem has been identified that enables efficient aerobic oxidative coupling of alcohols and amines to amides. All four permutations of benzylic/aliphatic alcohols and primary/secondary amines are viable in this reaction, enabling broad access to secondary and tertiary amides. The reactions exhibit excellent functional group compatibility and are complete within 30 min-3
strategy), or by condensation of an amide enolate with diethylchlorophosphate (second strategy). Acidic hydrolysis of () or () gives α-amidophosphonate () alkylated or not in the α -position. () and () react with aromatic or aliphatic aldehydes to produce α,β-unsatured secondary or tertiary amides ().
Direct Transformation of Secondary Amides into Secondary Amines: Triflic Anhydride Activated Reductive Alkylation
作者:Kai-Jiong Xiao、Ai-E Wang、Pei-Qiang Huang
DOI:10.1002/anie.201204098
日期:2012.8.13
transformation has been developed (see scheme; 2‐F‐Py=2‐fluoropyridine; Tf=trifluorosulfonyl). The amines are synthesized in good yields and the ketimine intermediates can be isolated before the reduction. This method should find applications in the synthesis of nitrogen‐containing bioactive molecules and medicinal agents.
which are building blocks for a variety of biologically active molecules and natural products. However, most attempts at the above [2+2] addition have focused on solid‐state, molten‐state, or host–guest systems under ultraviolet‐lightirradiation in order to overcome the competition of facile geometric isomerization of nonrigid olefins. We report a general and simple method to realize the intermolecular