Exploration of synthetic strategies for the stereoselective preparation of novel tetrahydrofuran-containing biaryls: A high-pressure promoted Diels-Alder approach
Three stereoselective syntheticapproaches to tetrahydrofuran-containing biaryl scaffolds are described. All approaches involve a high-pressure promoted Diels-Alder reaction of substituted diene with methyl propiolate to give, after aromatization, the corresponding biaryl. The tetrahydrofuran moiety can be created starting from aryl-Br or aryl-CO2Me functional groups through a γ-phenylseleno ketone
A new method for synthesis of five-membered carbocycles: use of the ester enolate rearrangement in conjunction with radical cyclization
作者:Ali Yousif Mohammed、Derrick L. J. Clive
DOI:10.1039/c39860000588
日期:——
4-(Phenylseleno)butyryl esters (2), easily prepared from allylic alcohols, are convertible into cyclopentanes by successive esterenolaterearrangement (2)→(3) and 5-exo-trigonal radicalcyclization (4)→(6); this general process is efficient and the stereochemical result is predictable.
The synthesis and structure-activity relationships of a series of orally absorbed O-2-isocephems are described. These compounds possessed a D-[(p-hydroxyphenyl)glycyl]amino substituent at the 7-position while the substituent at the 3-position was varied. Relative to the analogous cephems, the O-2-isocephems exhibited comparable to better activity against Gram-positive organisms. Against Gram-negative organisms, their activity was variable but did indicate a lower beta-lactamase stability. Following oral administration, the O-2-isocephems generally exhibited longer half-lives but lower Cmax's and urinary recoveries.
MOHAMMED ALI YOUSIF; CLIVE D. L. J., J. CHEM. SOC. CHEM. COMMUN.,(1986) N 8, 588-589
作者:MOHAMMED ALI YOUSIF、 CLIVE D. L. J.
DOI:——
日期:——
MASTALERZ, HAROLD;MENARD, MARCEL;VINET, VIVIANNE;DESIDERIO, JAMES;FUNG-TO+, J. MED. CHEM., 31,(1988) N 6, 1190-1196