A convergent synthesis of 4-substituted 1,2,3,4-tetrahydroisoquinolin-1-ones
摘要:
:A variety of 4-substituted 1,2,3,4-tetrahydroisoquinolin-1-ones 6 can be prepared by a two step radical sequence: intermolecular xanthate transfer addition to an N-allylbenzamide followed by cyclisation onto the aromatic ring. (C) 1998 Elsevier Science Ltd. All rights reserved.
One-Step RhCl3-Catalyzed Deprotection of Acyclic N-Allyl Amides
摘要:
[GRAPHICS]A convenient one-step RhCl3-catalyzed deprotection of acyclic N-allyl amides is described. Preliminary mechanistic studies reveal that the key to the success of the one-step deprotection process is the dual function of RhCl3 in alcohol solvents. Reaction of RhCl3 with n-PrOH not only provides an active rhodium hydride species to catalyze isomerization of N-allyl amides to corresponding enamides but also generates a crucial catalytic amount of HCl to convert the enamides to deallylated amides through N,O-acetal exchange.
Free Radical-Promoted Monochloroalkylarylation of Alkenes with Chloralkanes
作者:Yingming Ren、Yaxin Ge、Qinqin Yan、Shiliu Chen、Yang Li、Lijun Li、Zhong-Quan Liu、Zejiang Li
DOI:10.1021/acs.joc.1c01605
日期:2021.9.3
cascade cyclization of unactivated alkenes with chloralkanes, which undergoes selective activation of the α-C(sp3)–H bond of chloralkanes, provides a protocol for the synthesis of chlorinated heterocycles or polycyclic compounds. A series of radical inhibition experiments, radical capture operations, and radical clock tests were studied in this system.
Construction of 3,4-Dihydroisoquinolinones and Indanones via DTBP-Promoted Oxidative Coupling of <i>N</i>-Allylbenzamides with Aromatic Aldehydes
作者:Zhong-Qi Xu、Chao Wang、Lin Li、Lili Duan、Yue-Ming Li
DOI:10.1021/acs.joc.8b01242
日期:2018.9.7
A metal-freeoxidative tandem coupling of N-allylbenzamide with aryl aldehydes was realized. This method allowed the 1,2-difunctionalization of the C═C double bond in N-allylbenzamides through simultaneous formation of two C(sp2)–C(sp3) bonds. In the presence of DTBP, 4-substituted 3,4-dihydroisoquinolin-1(2H)-ones were obtained in satisfactory isolated yields. 3-Substituted indanones could also be
Hydroxyalkylation-Initiated Radical Cyclization of <i>N</i>-Allylbenzamide for Direct Construction of Isoquinolinone
作者:Wei Zhou、Shengyang Ni、Haibo Mei、Jianlin Han、Yi Pan
DOI:10.1021/acs.orglett.5b01140
日期:2015.6.5
A metal-free hydroxyalkylation-initiated radical six-membered heterocycle formation reaction of N-allylbenzamide is developed. This reaction proceeds through C(sp(3))H bond cleavage, oxyalkylation of the double bond, and intramolecular cyclization, which provides a new route toward 4-substituted 3,4-dihydroisoquinolin-1(2H)-one derivatives.
One-Step RhCl<sub>3</sub>-Catalyzed Deprotection of Acyclic <i>N</i>-Allyl Amides
作者:Michael J. Zacuto、Feng Xu
DOI:10.1021/jo070553t
日期:2007.8.1
[GRAPHICS]A convenient one-step RhCl3-catalyzed deprotection of acyclic N-allyl amides is described. Preliminary mechanistic studies reveal that the key to the success of the one-step deprotection process is the dual function of RhCl3 in alcohol solvents. Reaction of RhCl3 with n-PrOH not only provides an active rhodium hydride species to catalyze isomerization of N-allyl amides to corresponding enamides but also generates a crucial catalytic amount of HCl to convert the enamides to deallylated amides through N,O-acetal exchange.
A convergent synthesis of 4-substituted 1,2,3,4-tetrahydroisoquinolin-1-ones
作者:Nathalie Cholleton、Samir Z. Zard
DOI:10.1016/s0040-4039(98)01561-5
日期:1998.10
:A variety of 4-substituted 1,2,3,4-tetrahydroisoquinolin-1-ones 6 can be prepared by a two step radical sequence: intermolecular xanthate transfer addition to an N-allylbenzamide followed by cyclisation onto the aromatic ring. (C) 1998 Elsevier Science Ltd. All rights reserved.