Hetero-Diels–Alder additions to pent-4-enofuranosides: concise synthesis of hydroxylated pyrrolizidines
作者:John K Gallos、Vassiliki C Sarli、Christos I Stathakis、Theocharis V Koftis、Victoria R Nachmia、Evdoxia Coutouli-Argyropoulou
DOI:10.1016/s0040-4020(02)01251-6
日期:2002.11
A new facile method for the synthesis of hydroxylated pyrrolizidines of the alexine family has been developed, which involves hetero-Diels–Alder addition of ethyl 2-nitrosoacrylate to pent-4-enofuranosides and a further two-step reductive ring opening-ring closure treatment of the cycloadduct.
Synthesis of C-glycosylated amino acids by hetero-Diels–Alder addition of ethyl 2-nitrosoacrylate to exo-glycals
作者:Zoe S. Massen、Vassiliki C. Sarli、Evdoxia Coutouli-Argyropoulou、John K. Gallos
DOI:10.1016/j.carres.2010.12.001
日期:2011.2
C-Glycoamino acids bearing a variety of sugar moieties were prepared by the hetero-Diels-Alder addition of ethyl 2-nitrosoacrylate to exo-glycals. The reaction proceeds smoothly to yield spirocyclic oxazines that can be converted into useful products by several hydrogenolytic techniques. (C) 2010 Elsevier Ltd. All rights reserved.