Stereoselective aminohomologation of chiral α-alkoxy aldehydes via thiazole addition to nitrones. Application to the synthesis of N-acetyl-d-mannosamine
作者:Alessandro Dondoni、Federico Junquera、Francisco Luis Merchán、Pedro Merino、Tomas Tejero
DOI:10.1016/s0040-4039(00)74694-6
日期:1992.7
The addition of 2-lithiothiazole to nitrones derived from d-glyceraldehyde and d-arabinose affords anti-adducts from which α-amino aldehydes are revealed by thiazole-to-formyl deblocking. The methodology provides a new synthesis of N-acetyl d-mannosamine and d-mannosamine hydrochloride.
Determination of the absolute configuration of α-amino-2-alkylthiazoles by circular dichroism
作者:Francisco L. Merchán、Pedro Merino、Isabel Rojo、Tomás Tejero、Alessandro Dondoni
DOI:10.1016/0957-4166(95)00286-x
日期:1995.9
Correlation between absolute configuration at the alpha-centre of the thiazole ring in the title compounds and the sign of their Cotton effect (CE) in the range 217-230 nm is reported.
Dondoni, Alessandro; Franco, Santiago; Junquera, Federico, Chemistry - A European Journal, 1995, vol. 1, # 8, p. 505 - 520
作者:Dondoni, Alessandro、Franco, Santiago、Junquera, Federico、Merchan, Francisco L.、Merino, Pedro、et al.
DOI:——
日期:——
Stereocontrolled addition of 2-lithiothiazole to the nitrone derived from d-glyceraldehyde acetonide. A revision and extension
作者:Alessandro Dondoni、Santiago Franco、Francisco Luis Merchán、Pedro Merino、Tomás Tejero
DOI:10.1016/s0040-4039(00)73938-4
日期:1993.1
sense of diastereoselective addition of 2-lithiothiazole 1a to the nitrone 2 derived fromd-glyceraldehyde is reversed by the use of Lewis acids (Et2AlCl, TiCl4) as complexing agents; the configuration of the hydroxylamine adduct obtained from 1a and 2 in the absence of the above chelating agents, previously reported from these laboratories was revised.