119561-14-7Relevant articles and documents
EFFECT OF THE NATURE AND POSITION OF SUBSTITUENTS IN THE AROMATIC RING ON CATALYTIC REARRANGEMENT OF 1,3-BIS(2-CHLOROPHENOXY) AND 1,3-BIS(4-CHLOROPHENOXY)-2-METHYLENEPROPANES
Krasnov, V. A.,Levashova, V. I.,Bunina-Krivorukova, L. I.
, p. 954 - 958 (2007/10/02)
Unlike the thermal rearrangement, the catalytic rearrangement of 1,3-bis(2-chlorophenoxy)- and 1,3-bis(4-chlorophenoxy)-2-methylenepropanes (Ia, b) takes place by an intermolecular mechanism with the participation of only one O-C bond and subsequent cyclization of the obtained ether phenols to coumarans; rearrangement is faster in the case of the 2-chloro-substituted ether.The subsequent participation of the two O-C bonds in the isomerization is observed in the case of 1,3-bis(2,4-dichlorophenoxy)-2-methylenepropane on account of the retarded cyclization.