报道了 Co 和 Mn 催化的烯烃加氢肼和加氢叠氮化反应的发现、研究和实施。这些反应等效于 CC 双键与受保护的肼或偶氮酸的直接加氢胺化,但基于不同的概念,其中 H 和 N 原子来自两种不同的试剂,硅烷和氧化性氮源(偶氮二羧酸或磺酰叠氮化物) )。使用偶氮二羧酸二叔丁酯的加氢肼反应具有使用方便、官能团耐受性大、适用范围广的特点,包括单、二、三和四取代烯烃。氢叠氮化反应发展的关键是使用磺酰叠氮化物作为氮源和叔丁基过氧化氢的活化作用。发现该反应对于单、二和三取代烯烃的官能化是有效的,并且只有少数官能团是不能容忍的。获得的烷基叠氮化物是通用中间体,可以在不分离叠氮化物的情况下转化为游离胺或三唑。初步的机理研究表明,烯烃的氢化钴是限速的,然后是胺化反应。不能排除并可能涉及自由基中间体。然后进行胺化反应。不能排除并可能涉及自由基中间体。然后进行胺化反应。不能排除并可能涉及自由基中间体。
Copper−Carbene Complexes as Catalysts in the Synthesis of Functionalized Styrenes and Aliphatic Alkenes
作者:Hélène Lebel、Michaël Davi、Silvia Díez-González、Steven P. Nolan
DOI:10.1021/jo061781a
日期:2007.1.1
2-propanol. The copper catalysts are not only inexpensive compared to rhodium complexes, but they also exhibit better functional group compatibility with aromatic aldehydes and ketones. Indeed very high yields were obtained for the formation of styrenes containing nitro, trifluoromethyl, amino, and ester groups, as well as for pyridine-, pyrrole-, and indole-substituted alkenes.
Synthesis of vinylindoles and vinylpyrroles by the Peterson olefination or by use of the Nysted reagent
作者:Wayland E. Noland、Christopher L. Etienne、Nicholas P. Lanzatella
DOI:10.1002/jhet.313
日期:2011.3
Vinylindoles and vinylpyrroles were prepared from their corresponding aldehydes or ketones using the Peterson olefination, or by use of the Nysted reagent, a commercially available gem‐dimetallic compound. The two methods provide efficient and convenient access to these useful heterocyclic 1,3‐diene systems. J. Heterocyclic Chem., (2011).
nest: The first thiocarboxylation of styrenes and acrylates with CO2 to generate important β-thioacids was realized by using visible light as a driving force and catalytic iron salts as promoters. This multicomponentreaction features broad substrate scope, mild reaction conditions, and high regio-, chemo-, and diasteroselectivity. Mechanistic studies indicate that a radical pathway can account for the
[EN] AMINOACYLINDAZOLE IMMUNOMODULATORS FOR TREATMENT OF AUTOIMMUNE DISEASES<br/>[FR] IMMUNOMODULATEURS À BASE D'AMINOCYLINDAZOLE POUR LE TRAITEMENT DE MALADIES AUTO-IMMUNES
申请人:UNIV ROCKEFELLER
公开号:WO2017205296A1
公开(公告)日:2017-11-30
2-Acylindazole compounds of formula I or formula II are disclosed. These compounds inhibit Coagulation Factor XIIa. They are useful to treat autoimmune diseases.
The twofoldHeckreaction of the vinylpyrroles 3a and 3b with the iodobenzenes 4a-c led to the linear pyrrole oligomers 5, 6, and 7. The synthesis of both symmetrical and unsymmetrical oligomers, such as 10a and 10b, was also accomplished by a Heckreaction of 8 and 9 and by a Heckreaction of 3a and 11 followed by a Wittig reaction and a second Heckreaction with 8. The pentacyclic oligomers 14 and