Annulation of β-aryl-α-nitro-α,β-enals and 2,2-dimethyl-1,3-dioxan-5-one: a one-step assembly of nitrocyclitols. Application to a short practical synthesis of (±)-7-deoxy-2-epi-pancratistatin tetraacetate
Annulation of β-aryl-α-nitro-α,β-enals and 2,2-dimethyl-1,3-dioxan-5-one: a one-step assembly of nitrocyclitols. Application to a short practical synthesis of (±)-7-deoxy-2-epi-pancratistatin tetraacetate
Strategic applications of Baylis–Hillman adducts to general syntheses of 3-nitroazetidines
作者:Ankita Rai、Lal Dhar S. Yadav
DOI:10.1039/c1ob06274c
日期:——
A novel one-pothighly diastereoselective synthesis of substituted 3-nitroazetidines via an anionic domino process is described. The synthesis involves a high yielding annulation of Baylis–Hillman alcohols and their aldehydes with either N-aryl/tosylphosphoramidates or N-aryl/tosylphosphoramidates in combination with a task-specificionicliquid [bmim][X–Y] to afford the corresponding 1,2,3-tri- and
A new application of Baylis–Hillman alcohols to a diastereoselective synthesis of 3-nitrothietanes
作者:Ankita Rai、Lal Dhar S. Yadav
DOI:10.1016/j.tet.2012.01.062
日期:2012.3
Three key reactions, the generation of a nucleophile, an thia-Michael addition and an intramolecular cyclisation, were used to achieve an efficient one-pot diastereoseletive synthesis of 3-nitrothietanes. Thus, Baylis–Hillman alcohols and their aldehydes were reacted with either O,O-diethyl hydrogen phosphorodithioate or O,O-diethyl hydrogen phosphorodithioate in combination with a task-specific ionic