Exploiting the Nucleophilicity of NH Imines: Synthesis of Enamides from Alkyl Azides and Acid Anhydrides
作者:Junghoon Han、Mina Jeon、Han Kyu Pak、Young Ho Rhee、Jaiwook Park
DOI:10.1002/adsc.201400584
日期:2014.9.15
The nucleophilicity of N‐unsubstituted imines, which were generated from alkyl azides by a ruthenium‐catalyzedreaction, was investigated in the reaction with acid anhydrides. The initial products were N‐acylimines, which isomerized to the corresponding enamides. Heating or triethylamine facilitated the isomerization of N‐acylimines that are stable at room temperature. A wide range of acyclic and cyclic
申请人:POSTECH Research and Business Development Foundation 포항공과대학교 산학협력단(220040433361) BRN ▼506-82-07303
公开号:KR20160059189A
公开(公告)日:2016-05-26
본 발명은 유기 아자이드 화합물로부터 질소에 치환기가 없는 이민을 발생시키고, 그와 아실 주개와의 반응을 통해 엔아마이드 화합물을 합성하는 방법에 관한 것이다. 본 발명의 제조 방법을 이용하면, 적절한 촉매를 사용하여 알파 수소를 가진 유기 아자이드로부터 연속한 질소 제거 및 1,2-수소 옮김 반응을 통해 질소에 치환기가 없는 이민을 생성하고, 이 이민과 아실 주개를 반응시켜 엔아마이드 화합물을 합성할 수 있다.
Stereoselective Synthesis of (<i>E</i>)- and (<i>Z</i>)-Isocyanoalkenes
作者:Huan Tian、Caleb W. Holyoke、Fraser F. Fleming
DOI:10.1021/acs.orglett.2c03461
日期:2022.12.2
(E)- and (Z)-isocyanoalkenes were selectively synthesized via the sequential cross coupling of vinyl iodides with formamide, followed by dehydration. The optimal catalyst, generated in situ from CuII and trans-N,N′-dimethyl-1,2-cyclohexanediamine, rapidly coupled (E)- or (Z)-vinyl iodides with formamide, which minimized the isomerization of the resultant vinyl formamide. The method efficiently provided
( E )-和( Z )-异氰基烯烃是通过乙烯基碘与甲酰胺的顺序交叉偶联,然后脱水选择性合成的。最佳催化剂由 Cu II和反式-N,N'-二甲基-1,2-环己二胺原位生成,可将 ( E )-或 ( Z )-乙烯基碘与甲酰胺快速偶联,从而最大程度地减少生成物的异构化乙烯基甲酰胺。该方法有效地提供了一系列无环、碳环和杂环异氰基烯烃;非对映体异氰基抗生素 B371 和E -B371 的选择性立体发散合成说明了其多功能性。
Heterocyclic derivatives as platelet aggregation inhibitors
申请人:ZENECA LIMITED
公开号:EP0825184A1
公开(公告)日:1998-02-25
RS 3-Methyl-4-[4-(4-pyridyl)piperazin-1-yl]phenoxybutyric acid and metabolically labile ester or amides thereof, and pharmaceutically acceptable salts thereof useful as an inhibitor of the binding of fibrinogen to glycoprotein IIb/IIIa.