Preparation of 2,3-dihydro-2-methyl-2,3-dialkyl-7-oxybenzofurans
AssigneeUbe Industries, Ltd.
InventorsYukio Inaba, Taisei Igarashi, Susumu Tahara, Takashi Miyatake
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Abstract
A process for the preparation of a 2,3-dihydro-2-methyl-2,3-dialkyl-7-oxybenzofuran having the formula (I): ##STR1## in which R and R' are the same or different and each represents a lower alkyl group or hydrogen atom, which comprises reacting catechol with an aldehyde having the formula (II): (RCH.sub.2)(R')CHCHO (II) or an alcohol having the formula (III): RCH.dbd.C(R')--CH.sub.2 OH (III) in a gaseous phase in the presence of a solid acid catalyst. The products are useful as intermediates in the preparation of insecticides.
Claims18
A process for the preparation of a 2,3-dihydro-2-methyl-2,3-dialkyl-7-oxybenzofuran having the formula (I):
- ##STR6## wherein R and R' are the same or different and each represents a lower alkyl group or hydrogen atom, which comprises reacting catechol with an aldehyde having the formula (II) ##STR7## or an alcohol having the formula (III):
- ##STR8## in a gaseous phase in the presence of a solid acid catalyst.
Dependencies are inferred from the claim text.