Synthesis and in vitro pharmacology of 7-oxabicyclo[2.2.1]heptane analogs of thromboxane A2/PGH2
作者:P. W. Sprague、J. E. Heikes、J. Z. Gougoutas、M. F. Malley、D. N. Harris、R. Greenberg
DOI:10.1021/jm00149a007
日期:1985.11
A series of chemically stable TXA2/PGH2 analogues modeled after the structure of the natural products was prepared in search of useful inhibitors of TXA2/PGH2-mediated pathophysiology. Each of the 16 isomers implied in structure 1 was prepared in chiral form and evaluated for activity in vitro in platelets and smooth muscle. Depending on relative side chain and carbinol stereochemistry, TXA2/PGH2 agonist
Asymmetric synthesis of 4-amino-γ-butyrolactones via lithium amide conjugate addition
作者:Elin Abraham、Jason W.B. Cooke、Stephen G. Davies、Alan Naylor、Rebecca L. Nicholson、Paul. D. Price、Andrew D. Smith
DOI:10.1016/j.tet.2007.03.026
日期:2007.6
undergo competitive conjugateaddition and γ-deprotonation, while γ-tert-butyldimethylsilyloxy but-2-enoates undergo exclusive conjugateaddition. Treatment of γ-benzyloxy or γ-tert-butyldimethylsilyloxy but-2-enamides with lithium (R)-N-benzyl-N-(α-methylbenzyl)amide furnishes exclusively the γ-benzyloxy- or γ-tert-butyldimethylsilyloxy-β-amino amide products of conjugateaddition in high de. The γ