Synthesis and deprotection of [1-(ethoxycarbonyl)-4-[(diphenylmethoxy)carbonyl]-1-methyl-2-oxobutyl]triphenylphosphonium chloride: a key intermediate in the Wittig reaction between a cyclic anhydride and a stabilized ylide
Synthesis of Cyclic Acylated Enamino Esters from Enol Lactones, 4-Keto amides, and 5-Hydroxy Lactams
作者:A. D. Abell、M. D. Oldham、J. M. Taylor
DOI:10.1021/jo00110a026
日期:1995.3
Enol lactones react with an amine to give either a keto amide or a hydroxy lactam under mild conditions. Subsequent dehydration with p-toluenesulfonic acid (PTSA) gives a cyclic acylated enamino ester in good yield (Tables 1 and 2, Schemes 2 and 4). The key prostaglandin analog precursor 18 and the gly-gly dipeptide analogs 26a and 26b were prepared using the reported conditions. Acetylation of the chloro hydroxy lactam 31, prepared from the chloro enol lactones 29, followed by elimination of acetic acid gave the chloro acylated enamino esters 28.
ABELL, ANDREW D.;CLARK, BRUCE M.;ROBINSON, WARD T., AUSTRAL. J. CHEM., 41,(1988) N, C. 1243-1249
作者:ABELL, ANDREW D.、CLARK, BRUCE M.、ROBINSON, WARD T.
DOI:——
日期:——
ABELL, ANDREW D.;MORRIS, KATHRYN B.;LITTEN, J. CHRISTOPHER, J. ORG. CHEM., 55,(1990) N8, C. 5217-5221
作者:ABELL, ANDREW D.、MORRIS, KATHRYN B.、LITTEN, J. CHRISTOPHER
DOI:——
日期:——
Synthesis and deprotection of [1-(ethoxycarbonyl)-4-[(diphenylmethoxy)carbonyl]-1-methyl-2-oxobutyl]triphenylphosphonium chloride: a key intermediate in the Wittig reaction between a cyclic anhydride and a stabilized ylide
作者:Andrew D. Abell、Kathryn B. Morris、J. Christopher Litten
DOI:10.1021/jo00305a013
日期:1990.8
Abell, Andrew D.; Clark, Bruce M.; Robinson, Ward T., Australian Journal of Chemistry, 1988, vol. 41, # 8, p. 1243 - 1249
作者:Abell, Andrew D.、Clark, Bruce M.、Robinson, Ward T.