Synthesis and rotational properties of a series of polyaromatic clefts
摘要:
A series of molecular clefts containing convergent functional groups has been developed. The rotational processes occurring within these molecules have been investigated by dynamic NMR experiments and these results are compared with those obtained from molecular modelling.
Rhodium-Catalyzed [2+2+1+1] Cyclocarbonylative Coupling of Alkynes with Carbon Monoxide Affording Tetrasubstitutedp-Benzoquinones
作者:Qiufeng Huang、Ruimao Hua
DOI:10.1002/chem.200700839
日期:2007.10.5
In this strategy, the tetrasubstituted benzoquinones have been prepared directly by a [2+2+1+1] cyclocarbonylativecoupling reaction of internal alkynes with CO in the presence of [RhCl(CO)2]2. The low concentration of CO in the reaction is the crucial point for the chemoselective formation of tetrasubstituted benzoquinones in good to high yields. Functional groups such as chloro, methoxy, cyano, vinyl
A rhodium carbonyl complex, [RhCl(CO)(2)](2), serves as a catalyst of the intra- and inter-molecular Pauson-Khand reaction. By the use of the rhodium catalyst, cyclopentenone derivatives are prepared from various 1,6- and 1,7-enynes under 1 arm of CO. Furthermore, this rhodium-catalyzed reaction is accelerated by reducing partial pressure of CO to less than 1 atm. (C) 2001 Elsevier Science B.V. All rights reserved.
BANNIKOV G. F.; NIKIFOROV G. A.; IONGE K.; ERSHOV V. V., IZV. AN CCCP. CEP. XIM., 1980, HO 8, 1922-1925
作者:BANNIKOV G. F.、 NIKIFOROV G. A.、 IONGE K.、 ERSHOV V. V.
DOI:——
日期:——
Synthesis and rotational properties of a series of polyaromatic clefts
作者:Amalia Galán、Andrew J. Sutherland、Pablo Ballester、Julius Rebek
DOI:10.1016/s0040-4039(00)73499-x
日期:1994.7
A series of molecular clefts containing convergent functional groups has been developed. The rotational processes occurring within these molecules have been investigated by dynamic NMR experiments and these results are compared with those obtained from molecular modelling.