Synthesis of spiro- and dispirotetrahydropyrane-2,4-diones involving cyclobutane fragment in position 5 of heterocycle |
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| Authors: | Kirillov N F Melekhin V S |
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| Institution: | 1.Perm State University, ul. Bukireva 15, Perm, 614990, Russia
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| Abstract: | Methyl 3-(1-bromocyclobutyl)-2,2-dimethyl-3-oxopropanoates, 1-(1-bromocyclobutyl-carbonyl) cyclopentanoates and 1-(1-bromocyclobutylcarbonyl)cyclobutanoates
react with zinc and aromatic aldehydes to form 5-aryl-8,8-dimethyl-6-oxaspiro3.5]nonane-7,9-diones, 13-aryl-12-oxadispiro3.1.4.3]tridecane-5,11-diones
and 12-aryl-11-oxadispiro3.1.3.3]dodecane-5,10-diones respectively. |
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