Synthesis of the AB-ring segment for the convergent construction of the left half in ciguatoxin
摘要:
The synthesis of the AB-ring segment aiming at the convergent construction of the left half in ciguatoxin (CTX1B) has been achieved by a strategy based on ring-closing metathesis (RCM) and diastereocontrolled hydroboration to cyclic vinyl ethers. (C) 2002 Elsevier Science Ltd. All rights reserved.
作者:Xianbin Su、David S. Surry、Richard J. Spandl、David R. Spring
DOI:10.1021/ol8009545
日期:2008.6.1
Using an atropdiastereoselective oxidative biaryl coupling as the key step, the total synthesis of the ellagitannin natural product sanguiin H-5 is reported. Both organomagnesium and organozinc based metalation methodologies were used to efficiently construct the strained medium-ring core of the natural product.
Ellagitannin Chemistry. Evolution of a Three-Component Coupling Strategy for the Synthesis of the Dimeric Ellagitannin Coriariin A and a Dimeric Gallotannin Analogue
作者:Ken S. Feldman、Michael D. Lawlor、Kiran Sahasrabudhe
DOI:10.1021/jo0010936
日期:2000.11.1
The total synthesis of the dimeric ellagitannin coriariin A is reported. The key reaction to access the dimeric framework was realized early in the synthesis pathway via a bis acylation reaction of a dehydrodigalloyl diacid with 2 equiv of a glucopyranose trichloroacetimidate. The glucose rings were subsequently functionalized, culminating in a double oxidative cyclization to form stereoselectively
The synthesis of the AB-ring segment aiming at the convergent construction of the left half in ciguatoxin (CTX1B) has been achieved by a strategy based on ring-closing metathesis (RCM) and diastereocontrolled hydroboration to cyclic vinyl ethers. (C) 2002 Elsevier Science Ltd. All rights reserved.
Ellagitannin Chemistry. The First Total Synthesis of a Dimeric Ellagitannin, Coriariin A