A Short and Efficient Synthetic Process to Enantiomerically Pure (+)-Syributin 1
摘要:
For the synthesis of (+)-syributin 1 produced by bacteria which expresses the avrD gene, a simple and practical synthetic route is described in a short number of steps and high overall yield featuring the elaboration of D-arabinofuranose derivative.
A Short and Efficient Synthetic Process to Enantiomerically Pure (+)-Syributin 1
摘要:
For the synthesis of (+)-syributin 1 produced by bacteria which expresses the avrD gene, a simple and practical synthetic route is described in a short number of steps and high overall yield featuring the elaboration of D-arabinofuranose derivative.
Anomeric sugar boronic acid analogues as potential agents for boron neutron capture therapy
作者:Daniela Imperio、Erika Del Grosso、Silvia Fallarini、Grazia Lombardi、Luigi Panza
DOI:10.3762/bjoc.15.135
日期:——
of accelerators as neutron source, the access to new suitable agents for boron neutron capture therapy (BNCT) became a major need. Among many others, sugar boronicacids have recently attracted attention as boron carriers. Herein we report the synthesis and preliminary biological studies of two new sugar analogues containing a boronicacid at the anomeric position. The analogues were obtained by hydroboration
Synthesis of 2′,3″,4″-trisphosphate-containing analogs of adenophostin A
作者:Nicole C.R. van Straten、Gijsbert A. van der Marel、Jacques H. van Boom
DOI:10.1016/s0040-4020(97)00308-6
日期:1997.5
Adenophostin A analog 4 was prepared via trimethylsilyl trifluoromethanesulfonate (TMSOTf)-assisted glycosylation of (S)-6-N-diphenylacetyl-9-(2-tert-butyldiphenylsilyloxy-1-hydroxyprop-3-yl)-adenine (11) with trichloroacetimidate donor 12 to give dimer 13. Protective group manipulations on 13 followed by phosphitylation with N,N-diisopropyl-bis-[2-(methylsulfonyl)ethyl] phosphoramidite (17) and in situ oxidation gave, after deprotection, (25)-9-1-(alpha-D-glucopyranosyloxy 3,4-bisphosphate)-2-monophosphate-prop-3-yl}-adenine (4) Condensation of phosphoryloxymethyladenosine 25 with D-arabinitol derivative 21 under the agency of TMSOTf afforded methylene acetal 26. Protective group manipulations (--> 32), phosphorylation, and deprotection yielded 3'-O-(D-arabinitol-4-O-methylene 2,3-bisphosphate)-adenosine 2'-monophosphate (5), a methylene acetal-containing analog of adenophostin A. (C) 1997 Elsevier Science Ltd.