Efficient Synthesis of (+)-Kalafungin and (-)-Nanaomycin D by Asymmetric Dihydroxylation, Oxa-Pictet-Spengler Cyclization, and H2SO4-Mediated Isomerization
Efficient Synthesis of (+)-Kalafungin and (-)-Nanaomycin D by Asymmetric Dihydroxylation, Oxa-Pictet-Spengler Cyclization, and H2SO4-Mediated Isomerization
A Chiron Approach to the Total Synthesis of (−)-Juglomycin A, (+)-Kalafungin, (+)-Frenolicin B, and (+)-Deoxyfrenolicin
作者:Rodney A. Fernandes、Vijay P. Chavan、Sandip V. Mulay、Amarender Manchoju
DOI:10.1021/jo3019939
日期:2012.11.16
A general, efficient, and common strategy for the synthesis of (−)-juglomycin A, (+)-kalafungin, (+)-frenolicin B, and (+)-deoxyfrenolicin is reported here. The strategy involves the synthesis of a key building block alkyne from a cheap chiral pool material, d-glucono-δ-lactone, Dötzbenzannulation, oxa-Pictet-Spengler reaction, and H2SO4-mediated epimerization.
此处报道了合成(-)-珠红霉素A,(+)-卡拉芬净,(+)-肾上腺素B和(+)-脱氧肾上腺素的通用,有效且通用的策略。该策略涉及由廉价的手性池材料,d-葡萄糖酸-δ-内酯,Dötz苯环化,oxa-Pictet-Spengler反应和H 2 SO 4介导的差向异构化合成关键的结构单元炔烃。
Brimble, Margaret A.; Stuart, Susan J., Journal of the Chemical Society. Perkin transactions I, 1990, # 4, p. 881 - 885
作者:Brimble, Margaret A.、Stuart, Susan J.
DOI:——
日期:——
BRIMBLE, MARGARET A.;STUART, SUSAN J., J. CHEM. SOC. PT 1. PERKIN TRANS.,(1990) N, C. 881-885
作者:BRIMBLE, MARGARET A.、STUART, SUSAN J.
DOI:——
日期:——
BRIMBLE, MARGARET A;HODGES, RICHARD;STUART, SUSAN J., TETRAHEDRON LETT., 29,(1988) N 46, C. 5987-5990
作者:BRIMBLE, MARGARET A、HODGES, RICHARD、STUART, SUSAN J.
DOI:——
日期:——
Reductive thioalkylation of a kalafungin analogue
作者:Margaret A. Brimble、Michael R. Nairn
DOI:10.1016/s0040-4039(98)00884-3
日期:1998.7
Reduction of pyranonaphthoquinone 3 with sodium dithionite in the presence of the sulfur nucleophiles thiocresol, benzylmercaptan and butanethiol afforded the thioalkylated products 4,5; 6,7; and 8,9 respectively. The isolation of these products provides the first example of the ability of pyranonaphthoquinone antibiotics such as kalafungin 1 to undergo reductive thioalkylation at the C-4 position. (C) 1998 Elsevier Science Ltd. All rights reserved.