Synthesis of substituted chromenes through the DABCO-catalyzed reaction of but-3-yn-2-one and methyl propiolate with salicyl N-tosylimines (DABCO = 1,4-diazabicyclo[2.2.2]octane).
The DABCO-catalyzed (DABCO = 1,4-diazabicyclo[2.2.2]octane) reaction of but-3-yn-2-one and methyl propiolate with salicyl N-tosylimines yields highly functionalized chromenes and has been thoroughly investigated; the rational mechanism for the reaction has been demonstrated on the basis of 1H NMR spectroscopic investigation.
Shi
Yong-Ling
YL
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China.
Shi
Min
M
D000480:Alkynes / Q000737:chemistry*; D001578:Benzopyrans / Q000138:chemical synthesis*; D002384:Catalysis; D007097:Imines / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D010879:Piperazines; D011422:Propionates / Q000737:chemistry*
D000480:Alkynes; D001578:Benzopyrans; D007097:Imines; D007659:Ketones; D010879:Piperazines; D011422:Propionates; C011537:propiolic acid; C007306:triethylenediamine