An approach to an enantioselective synthesis of crisamicin A via a novel double Hauser–Kraus annulation strategy
作者:Olivier Andrey、Jonathan Sperry、Uffe S. Larsen、Margaret A. Brimble
DOI:10.1016/j.tet.2008.02.065
日期:2008.4
A double Hauser–Kraus annulation between biscyanophthalide 4 and the d-mannose derived enone 39 provides access to an advanced intermediate 54 that is an excellent scaffold to effect an enantioselective total synthesis of crisamicin A 1.
在双氰基酞化物4和d-甘露糖衍生的烯酮39之间进行的双重Hauser-Kraus环空法可提供进入高级中间体54的通道,该中间体是影响crisamicin A 1的对映选择性全合成的优良骨架。
An efficient synthesis of phthalides by Diels-Alder reaction of sulfur-substituted furanones with silyloxydienes: A formal synthesis of mycophenolic acid.
Highly substituted phthalides including a key intermediate in the synthesis of mycophenolic acid were prepared by the Diels-Alder reaction of 3-(phenylthio- or 3-(phenylsulfinyl)-2-(5H)-furanones with silyloxydienes.
Toward an Asymmetric Synthesis of the Dimeric Pyranonaphthoquinone Antibiotic Crisamicin A
作者:Margaret A. Brimble、Najmah P. S. Hassan、Briar J. Naysmith、Jonathan Sperry
DOI:10.1021/jo501344c
日期:2014.8.1
A full account of our efforts toward an asymmetric synthesis of crisamicin A are presented. The key steps include a Hauser-Kraus annulation of a cyanophthalide with a chiral enone-lactone, a stereoselective cyclization-reduction to install the pyran unit, and a Suzuki homocoupling to forge the key biaryl bond. This work has culminated in the asymmetric synthesis of a dimer bearing the complete carbon skeleton of the dimeric pyranonaphthoquinone natural product crisamicin A.
WATANABE, MITSUAKI;TSUKAZAKI, MASAO;HAMADA, YUMIKO;IWAO, MASATOMO;FURUKAW+, CHEM. AND PHARM. BULL., 37,(1989) N1, C. 2948-2951