Total Synthesis of Natural Hyacinthacine C<sub>5</sub> and Six Related Hyacinthacine C<sub>5</sub> Epimers
作者:Anthony W. Carroll、Kongdech Savaspun、Anthony C. Willis、Masako Hoshino、Atsushi Kato、Stephen G. Pyne
DOI:10.1021/acs.joc.8b00585
日期:2018.5.18
The total synthesis of natural (+)-hyacinthacine C5 was achieved, which allowed correction of its initially proposedstructure, as well as six additional hyacinthacine C-type compounds. These compounds were readily accessible from two epimeric anti-1,2-amino alcohols. Keeping a common A-ring configuration, chemical manipulation occurred selectively on the B-ring of the hyacinthacine C-type products
Alkoxyallene-Based Stereodivergent Syntheses of (−)-Hyacinthacine B<sub>4</sub> and of Putative Hyacinthacine C<sub>5</sub> Epimers: Proposal of Hyacinthacine C<sub>5</sub> Structure
Hyacinthacines are members of the class of polyhydroxylated pyrrolizidines exhibiting outstanding biological activity as glycosidasesinhibitors. Their structural complexity is embodied in the densely functionalized core, possessing a series of contiguous stereogenic centers. In this synthetic study we report a route to the more complex congeners of this class of alkaloids exploiting the diastereoselective
Synthesis of the Proposed Structure of Pentahydroxylated Pyrrolizidine Hyacinthacine C5 and Its C6,C7 Epimer
作者:Juan A. Tamayo、Francisco Franco、Fernando Sánchez-Cantalejo
DOI:10.1002/ejoc.201101126
日期:2011.12
The synthesis of two pentahydroxylatedpyrrolizidines, hyacinthacineC5 (1) and 6,7-di-epi-hyacinthacine C5 (12), from an orthogonally protected pyrrolidine of 2,5-dideoxy-2,5-imino-D-mannitol configuration (i.e., 7) is described. The analytical and spectroscopic data of synthetic 1 present some differences with those of natural hyacinthacineC5 that exceed the previously observed variations in similar