Chemo-enzymatic synthesis and glycosidase inhibitory properties of DAB and LAB derivatives
作者:Alda Lisa Concia、Livia Gómez、Jordi Bujons、Teodor Parella、Cristina Vilaplana、Pere Joan Cardona、Jesús Joglar、Pere Clapés
DOI:10.1039/c3ob27343a
日期:——
strategy for the preparation of 2-aminomethyl derivatives of (2R,3R,4R)-2-(hydroxymethyl)pyrrolidine-3,4-diol (also called 1,4-dideoxy-1,4-imino-D-arabinitol, DAB) and its enantiomer LAB is presented. The synthesis is based on the enzymatic preparation of DAB and LAB followed by the chemical modification of their hydroxymethyl functionality to afford diverse 2-aminomethyl derivatives. This strategy
A common strategy towards the synthesis of 1,4-dideoxy-1,4-imino-l-xylitol, deacetyl (+)-anisomycin and amino-substituted piperidine iminosugars
作者:Vimal Kant Harit、Namakkal G. Ramesh
DOI:10.1016/j.carres.2020.107988
日期:2020.6
(+)-anisomycin was a consequence of thermodynamically driven concomitant intramolecular nucleophilic addition reaction of the amino group to the resultant aldehyde obtained by oxidative cleavage of the amino-vicinal diol. Alternatively, double nucleophilic substitution on an amino-diol, after mesylation, with various amines delivered amino-substituted piperidine iminosugars in good yields.
The Efficient, Enantioselective Synthesis of Aza Sugars from Amino Acids. 1. The Polyhydroxylated Pyrrolidines
作者:Yifang Huang、David R. Dalton、Patrick J. Carroll
DOI:10.1021/jo962028s
日期:1997.1.1
(+)-serine or (-)-serine, as appropriate, convenient, high-yield, enantioselective synthesis of all eight stereoisomeric 2-hydroxymethyl-3,4-dihydroxypyrrolidines (the enantiomeric pairs of iminoribitol, -arabinitol, -xylitol, and -lyxitol) can be effected. The absolute configuration of the starting amino acid defines the set of azasugars produced.
Synthesis of hydroxylated pyrrolidines by allenic cyclisation
作者:Pearly Shuyi Ng、Roderick W. Bates
DOI:10.1016/j.tet.2016.08.029
日期:2016.10
The diastereoselective gold(I) catalysed cyclisation of highly substituted aminoallene derivatives allows the synthesis of both epi-DAB-1 and di-epi-lentiginosine. While the sense of stereoselectivity observed is in line with earlier observations on analogous piperidine-forming cyclisations, different ligands and reaction conditions are required to obtain good yields.
A Short and Efficient Synthesis of 2R,3R,4R-3,4-Dihydroxyproline, 1,4-Dideoxy-1,4-imino-l-xylitol, 2R,3R,4R,5S-3,4,5-Trihydroxypipecolic Acid, and 1,5-Dideoxy-1,5-imino-l-iditol
作者:Byong Won Lee、Ill-Yun Jeong、Min Suk Yang、Sang Uk Choi、Ki Hun Park
DOI:10.1055/s-2000-6408
日期:——
The syntheses of pyrrolidine alkaloids (-)-1 and (+)-3 were accomplished in 47% and 60% overall yield from 2-azido-2-deoxy-l-idonate 5, while piperidine alkaloids (-)-2 and (+)-4 were obtained in 51% and 53% overall yield from the same starting material. Key step includes iodine promoted one-pot cyclization, and selective deprotection of isopropylidene and 9-phenylfluoren-9-yl (Pf) group.