Synthesis of the Integrastatin Nucleus Using the Ramberg−Bäcklund Reaction
摘要:
The first synthesis of the tetracyclic nucleus of the Integrastatins, natural products that have been shown to selectively inhibit HIV-1 integrase, is reported. Key steps of this synthesis involve a novel cis-selective Ramberg-Backlund reaction and an unusual Lewis acid-promoted cyclization step.
Synthesis of the Integrastatin Nucleus Using the Ramberg−Bäcklund Reaction
摘要:
The first synthesis of the tetracyclic nucleus of the Integrastatins, natural products that have been shown to selectively inhibit HIV-1 integrase, is reported. Key steps of this synthesis involve a novel cis-selective Ramberg-Backlund reaction and an unusual Lewis acid-promoted cyclization step.
Unexpected Z-stereoselectivity in the Ramberg–Bäcklund reaction of diarylsulfones leading to cis-stilbenes: the effect of aryl substituents and application in the synthesis of the integrastatin nucleus
作者:Jonathan S. Foot、Gerard M. P. Giblin、A. C. Whitwood、R. J. K. Taylor
DOI:10.1039/b418426b
日期:——
With certain substituent patterns, benzylbenzylsulfone systems have been found to give unexpectedly high Z-stereoselectivity (up to E:Z = 1:16) in the Meyers variant of the Ramberg-Backlundreaction. A range of sulfones, bearing various aryl substituents, were explored to rationalize this unprecedented selectivity for Z-stilbene systems. This high level of double bond stereocontrol has also been