80098-81-3Relevant academic research and scientific papers
Catalytic ring expansion of vinyl oxetanes: Asymmetric synthesis of dihydropyrans using chiral counterion catalysis
Guo, Boying,Schwarzwalder, Gregg,Njardarson, Jon T.
supporting information; experimental part, p. 5675 - 5678 (2012/07/03)
Acid Showdown! The first catalytic ring expansion of vinyl oxetanes to 3,6-dihydro-2H-pyrans is described. Copper(II) triflate emerged as the best catalyst for this new transformation, which has broad scope as demonstrated by the eighteen examples included. The symmetric vinyl oxetane substrate can be asymmetrically desymmetrized when using either chiral Lewis or Bronsted acids as catalysts. Copyright
SYNTHESIS OF SUBSTITUTED 5,6- AND 3,6-DIHYDRO-2H-PYRANS BY ACID CONDENSATION OF ISOBUTYLENE AND α-METHYLSTYRENE WITH ALIPHATIC ALDEHYDES
Romanov, N. A.,Kantor, E. A.,Karakhanov, R. A.,Rakhmankulov, D. L.
, p. 351 - 354 (2007/10/02)
2,4-Disubstituted dihydropyrans, isomeric with respect to the position of the double bond, were obtained by the reaction of isobutylene and α-methylstyrene with formaldehyde and aliphatic aldehydes.
PRODUCTION OF SUBSTITUTED 5,6- AND 3,6-DIHYDRO-2H-PYRANS FROM 4,4-DIMETHYL- AND 4-METHYL-4-PHENYL-1,3-DIOXANES AND CARBONYL COMPOUNDS
Romanov, N. A.,Kantor, E. A.,Musavirov, R. S.,Karakhanov, R. A.,Rakhmankulov, D. L.
, p. 1576 - 1581 (2007/10/02)
2,4-Disubstituted and 2,2,4-trisubstituted dihydropyrans, isomeric with respect to the position of the double bond, were obtained by the reaction of 4,4-dimethyl- and 4-methyl-4-phenyl-1,3-dioxanes with aldehydes and ketones.The effects of temperature and of the amount and nature of the catalyst on the direction and selectivity of the reaction were investigated.
