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Studies on the sequential claisen rearrangement of methyl-3-arlyloxy- 2-(aryloymethyl)prop-2-enolates

โœ Scribed by D Gopal; K Rajagopalan

Book ID
104228015
Publisher
Elsevier Science
Year
1987
Tongue
French
Weight
190 KB
Volume
28
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

Claisen rearrangement of methyl-3-aryloxy-2-(aryloxymethyl)prop-Z-enoates (4) in refluxing N,N -diethylaniline gave 3-(Z-hydroxyphenylmethylene) -3,4-dihydro-ZH-1-benzopytan_Z-ones (6) and 3-methoxycarbonyl-ZH-I-benzopyrans(7).

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The synthesis and Claisen rearrangement of methyl g-acyloxycrotonatea have bean reinvestigated. A number of methyl v-aryloxycrotonatee have been prepared and suceasfully rearranged to a mixture af Z and E 5-athylidanabanzofuran-2(3H)onea in ref luxing ethylene glydol.