Majumdar, K. C.; Choudhury, P. K.; Biswas, P., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1998, vol. 37, # 11, p. 1197 - 1201
作者:Majumdar, K. C.、Choudhury, P. K.、Biswas, P.
DOI:——
日期:——
Majumdar Krishna C., Choudhury Prabir K., Nethai Munirathinam, Tetrahedron Lett, 35 (1994) N 32, S 5927-5930
作者:Majumdar Krishna C., Choudhury Prabir K., Nethai Munirathinam
DOI:——
日期:——
An unusual chromone formation, and its rearrangement to a coumarin
作者:Krishna C. Majumdar、Prabir K. Choudhury、Munirathinam Nethaji
DOI:10.1016/s0040-4039(00)78221-9
日期:1994.8
3-(2′-cyclopentenyl)-4-hydroxy[1]Benzopyran-2-one(2) or its acetate (3) reacts with pyridine hydrotribromide to give the fused furo chromone (4) in 90% yield, which on refluxing in 50% H2SO4 furnishes the fused furo coumarin (5) in 87% yield.
3-(2'-环戊烯基)-4-羟基[1]苯并吡喃-2-酮(2)或它的乙酸酯(3)与氢三溴吡啶反应,以90%的收率得到熔融的呋喃色酮(4),在回流时将其还原在50%H 2 SO 4中的产率为87%,提供了熔融的呋喃香豆素(5)。
Majumdar; Choudhury; Biswas, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1999, vol. 38, # 11, p. 1248 - 1252