The first total synthesis of the highly complex and potent anticancer agent haouamine A is reported through an eight-step sequence. Brevity of the sequence and complete control of chemo-, position-, and stereoselectivity (both planar and axial chirality) were possible through the invention of chemistry specifically tailored for the problems at hand, namely a cascade annulation proceeding via a hitherto unknown chemical entity for the indeno-tetrahydropyridine ring system as well as a pyrone-assisted stitching of the daunting bent-aromatic ring.
Total synthesis of haouamine A: the indeno-tetrahydropyridine core
摘要:
A full account of synthetic efforts toward the indeno-tetrahydropyridine core of haouamine A is presented. initial failed strategies led to the unexpected discovery of a mild abnormal Chichibabin pyridine synthesis and provided knowledge and inspiration for the development of a cascade annulation that has enabled rapid and scalable access to the core in either racemic or enantiopure form. (C) 2009 Elsevier Ltd. All rights reserved.
The first total synthesis of the highly complex and potent anticancer agent haouamine A is reported through an eight-step sequence. Brevity of the sequence and complete control of chemo-, position-, and stereoselectivity (both planar and axial chirality) were possible through the invention of chemistry specifically tailored for the problems at hand, namely a cascade annulation proceeding via a hitherto unknown chemical entity for the indeno-tetrahydropyridine ring system as well as a pyrone-assisted stitching of the daunting bent-aromatic ring.
Total synthesis of haouamine A: the indeno-tetrahydropyridine core
作者:Noah Z. Burns、Mikkel Jessing、Phil S. Baran
DOI:10.1016/j.tet.2009.05.075
日期:2009.8
A full account of synthetic efforts toward the indeno-tetrahydropyridine core of haouamine A is presented. initial failed strategies led to the unexpected discovery of a mild abnormal Chichibabin pyridine synthesis and provided knowledge and inspiration for the development of a cascade annulation that has enabled rapid and scalable access to the core in either racemic or enantiopure form. (C) 2009 Elsevier Ltd. All rights reserved.