Heterocycles p. 1589 - 1592 (1990)
Update date:2022-08-03
Topics:
Muraoka, Osamu
Tanabe, Genzoh
Momose, Takefumi
The effect of 'central methane' substitution on the di-?-methane rearrangement in 4-(phenylmethyl)-2(5H)-furanones (1b-d) was investigated.Significant enhancement of efficiency in the reaction leading in high combined yields to two isomeric products (endo-2 and exo-2) was discussed in terms of both the substituent effects at the allylic methane carbon and the restrained feature of the ring-enrolled ?-system.
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