2,3-Dichloro-5,6-dicyano-1,4-benzoquinone, a mild catalyst for the formation of carbon-nitrogen bonds
作者:Jean Jacques Vanden Eynde、Florence Delfosse、Pascal Lor、Yves Van Haverbeke
DOI:10.1016/0040-4020(95)00252-4
日期:1995.5
2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) catalyzes the preparation of N-tetrahydropyranylbenzazoles, 2-substituted 1,3-diphenylimidazolidines, and N-(arylmethylene)benzene-1,2-diamines. In the latter case, use of one equivalent of DDQ provides a novel one-pot method for the synthesis of 1H-benzimidazoles.
Imidazolidine Hydride Donors in Palladium-Catalyzed Alkyne Hydroarylation
作者:Soe L. Tun、S. V. Santhana Mariappan、F. Christopher Pigge
DOI:10.1021/acs.joc.2c00725
日期:2022.6.17
were converted to trisubstituted alkenes via a syn hydroarylation process, while a terminal alkyne was converted to a cis alkene via a formal trans hydroarylation reaction. Benzanilide products could be converted to carboxylic acidderivatives under basic conditions, resulting in the net conversion of alkynyl aldehydes to alkenyl carboxylic acids. A styrene derivative with an attached N,N′-dimethylbenzimidazoline
醛衍生的咪唑烷作为氢化物供体参与分子内还原 Heck 型反应。由邻-炔基苯甲醛制备的N , N ' -二苯基咪唑烷经过区域选择性和立体选择性钯催化加氢芳基化,然后进行形式 1,5-氢化物转移和还原消除,得到取代的烯烃和咪唑部分,后者方便地原位转化为环-打开苯甲酰苯胺以简化产品分离。内部炔烃通过顺式加氢芳基化过程转化为三取代烯烃,而末端炔烃通过形式反式转化为顺式烯烃加氢芳基化反应。苯甲酰苯胺产物可以在碱性条件下转化为羧酸衍生物,导致炔基醛净转化为烯基羧酸。还发现具有连接的N,N'-二甲基苯并咪唑啉氢化物供体的苯乙烯衍生物经历类似的氢化芳基化/苯并咪唑啉氧化,得到二芳基乙烷产物。
REACTIONS OF MONO- AND DI-AMINES WITH CARBON DISULFIDE. II. METHYLENEDIAMINE AND IMIDAZOLIDINE-CARBON DISULFIDE REACTIONS<sup>1</sup>
作者:ROBERT A. DONIA、JAMES A. SHOTTON、LLOYD O. BENTZ、GEORGE E. P. SMITH
DOI:10.1021/jo01158a004
日期:1949.11
Plieninger; Werst, Chemische Berichte, 1955, vol. 88, p. 1956,1960
作者:Plieninger、Werst
DOI:——
日期:——
Eynde, Jean Jacques Vanden; Mayence, Annie; Lor, Pascal, Bulletin des Societes Chimiques Belges, 1995, vol. 104, # 6, p. 387 - 392
作者:Eynde, Jean Jacques Vanden、Mayence, Annie、Lor, Pascal、Haverbeke, Yves Van