Synthesis of Pyrazolo[3,4-d]-4,5-dihydropyrimidines through [5+1] Cyclocondensation
摘要:
Twenty-five diverse pyrazolo[3,4-d]-4,5-dihydropyrimidines were synthesized in 73-91% yield through TMS-promoted [5+1] heterocyclization of aldehydes with pyrazolylamidines.
Transition metal-free one-pot synthesis of 2-substituted 3-carboxy-4-quinolone and chromone derivatives
作者:Jian-Ping Lin、Ya-Qiu Long
DOI:10.1039/c3cc41690a
日期:——
A novel one-pot synthesis of the 2-substituted 3-carboxy-4-quinolone/chromone derivatives from readily available 3-oxo-3-arylpropanoates and amides/acyl chlorides is reported, without any transition metal aid.
Twenty-five diverse pyrazolo[3,4-d]-4,5-dihydropyrimidines were synthesized in 73-91% yield through TMS-promoted [5+1] heterocyclization of aldehydes with pyrazolylamidines.