Enantioselective Ruthenium(II)/Xyl-SunPhos/Daipen-Catalyzed Hydrogenation of γ-Ketoamides
摘要:
A series of gamma-hydroxy amides were synthesized with high enantioselectivities (up to 99%) using asymmetric hydrogenation of the corresponding gamma-ketoamides in the presence of Ru-Xyl-SunPhos-Daipen catalyst providing key building blocks for a variety of naturally occurring and biologically active compounds.
Metal‐Free Synthesis of
<i>N</i>
‐Aryl Amides using Organocatalytic Ring‐Opening Aminolysis of Lactones
作者:Wusheng Guo、José Enrique Gómez、Luis Martínez‐Rodríguez、Nuno A. G. Bandeira、Carles Bo、Arjan W. Kleij
DOI:10.1002/cssc.201700415
日期:2017.5.9
Catalytic ring‐opening of bio‐sourced non‐strained lactones with aromatic amines can offer a straightforward, 100 % atom‐economical, and sustainable pathway towards relevant N‐aryl amide scaffolds. Herein, the first general, metal‐free, and highly efficient N‐aryl amide formation is reported from poorly reactive aromatic amines and non‐strained lactones under mild operating conditions using an organic
Sulfur-containing heterocycles derived by the reaction of hydroxy-amides and Lawesson's reagent
作者:Takehiko Nishio
DOI:10.1016/0040-4039(95)01232-7
日期:1995.8
A simple one-pot reaction between hydroxy-amides (1) located, 1,3- or 1,4- to each other, and Lawesson's reagent (LR) gives sulfur-containg heterocycles such as tetrahydrothiophene-2-imines (4), tetrahydrothiophene-2-thione (5) and tetrahydrothiopyrandash2-thione (6). Similar reaction of 3-N-acylamino-alcohols (7) affords thiazoline derivatives (9).
Thionation of ω-hydroxy amides with Lawesson's reagent: Synthesis of thioenamides and sulfur-containing heterocycles
作者:Takehiko Nishio、Hiroshi Sekiguchi
DOI:10.1016/s0040-4020(99)00200-8
日期:1999.4
The thionation of omega-hydroxy amides with Lawesson's reagent [LR: 2,4-bis(p-methoxyphenyl)- 1,3,2,4-dithiaphosphetane-2,4-disulfide] is described. The treatment of 3-hydroxy amides 1 with LR exclusively gave thioenamides 2 in fair yields. The treatment of 4-hydroxy amides 5 with LR yielded sulfur-containing heterocycles such as tetrahydrothiophene-2-imines 6 and tetrahydrothiophene-2-thione 7a through cyclization of intermediates, 4-mercapto amides 8. The 5-hydroxy amides 13 also reacted with LR to afford tetrahydrothiopyrane-2-thione 14 as the the sole product. (C) 1999 Elsevier Science Ltd. All rights reserved.
TAKAHATA, HIROKI;WANG, ENG-CHI;YAMAZAKI, TAKAO, SYNTH. COMMUN., 18,(1988) N 10, C. 1159-1165