Thioester tethered organosilatranes were synthesized. The substituent effect on the absorption spectra and potential for binding with Cu2+were explored.
巯酯键合的有机硅环烷已合成。研究了取代基对吸收光谱的影响以及与Cu2+结合的潜力。
Synthesis and Structure-Activity Relationships of Vasicine Analogues as Bronchodilatory Agents
The series of vasicine ( 1 ) analogues, an alkaloid from Adhatoda vasica Nees., were synthesized with changes in A, B or C rings. Compounds 13-19 were evaluated for in vitro bronchodilatory activity using isolated guinea pig tracheal chain. Compounds 3-8 were also synthesized in good yields using microwave-mediated synthesisundersolventfreeconditions. Compounds 5 and 8 with seven-member C ring
First Total Synthesis of (-)-Circumdatin H, a Novel Mitochondrial NADH Oxidase Inhibitor
作者:D. Bose、M. Chary
DOI:10.1055/s-0029-1218606
日期:2010.2
convergent synthesis of the mitochondrial NADH oxidase inhibitor (-)-circumdatin H is described. The strategy employs the intramolecular Eguchi aza-Wittig protocol as a key step to install the crucial central core BC ring system, leading to the firsttotalsynthesis of the target molecule. benzodiazepine alkaloids - circumdatin H - mitochondrial NADH oxidase - intramolecular aza-Wittig reaction - Eguchi
Efficient syntheses of 2,3-disubstituted natural quinazolinones via iridium catalysis
作者:Jie Fang、Jianguang Zhou
DOI:10.1039/c2ob07178a
日期:——
Natural products sclerotigenin, pegamine, deoxyvasicinone, mackinazolinone, and rutaecarpine were synthesized. Core quinazolinone structures were constructed via Ir catalysis.
Total Syntheses of the Benzodiazepine Alkaloids Circumdatin F and Circumdatin C
作者:Anette Witt、Jan Bergman
DOI:10.1021/jo001696h
日期:2001.4.1
Total syntheses of circumdatinF and circumdatin C, which both possess a 3H-quinazolin-4-one as well as a 1,4-benzodiazepin-5-one moiety, are described. A tripeptide derivative was synthesized as a key intermediate and dehydrated to a benzoxazine by reaction with triphenylphosphine, iodine, and a tertiary amine. The natural products were attained via rearrangements to an amidine intermediate, deprotection