Tetrahedron Letters p. 241 - 244 (1988)
Update date:2022-08-02
Topics:
Joglekar, S. J.
Samant, S. D.
1-(2-Hydroxyphenyl)-3-phenyl-1,3-propanedione (1a) reacts with formaldehyde in the presence of different 1-arylpiperazines (2) to form (1:1) inclusion compounds (3) which on column chromatographic separation yield 4,5;11,12-dibenzo-7-hydroxymethyl-1,3-dioxa-6,10-dioxo-7,9 diphenylcyclododecane (4) and the corresponding 2. 1 react with formaldehyde in the presence of triethylamine to form 3-aroyl-3-(2,3-dihydro-4H-1-benzopyran-4-one-3-ylmethyl)-2,3-dihydro-4H-1-benzopyran-4-one (5) along with benzoic acids and with bezaldehydes in the presence of a base to give 2-aryl-2,3-dihydro-4H-1-benzopyran-4-one (6)
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Doi:10.1016/0040-4039(88)85264-X
(1988)Doi:10.1002/hc.21217
(2014)Doi:10.1021/jo00258a018
(1988)Doi:10.1016/S0040-4039(00)82029-8
(1988)Doi:10.1039/c6cc04381j
(2016)Doi:10.1016/j.bmc.2009.04.036
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