Syntheses via dihydro-1, 3-oxazines. VI. A carboxyl protecting group stable to the Grignard reagent. A new synthesis of carboxylic acids

AI Meyers, IR Politzer, BK Bandlish…

Index: Meyers,A.I. et al. Journal of the American Chemical Society, 1969 , vol. 91, p. 5886 - 5887

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Citation Number: 8

Abstract

5886 taining 10 residue per cent lauroyl groups). For each nitrophenyl ester the rate is substantially greater with lauroylpolyethylenimine than with polymer containing no acyl group. Furthermore the trend in k is now markedly upward as the acyl group is increased from 2 to 12 carbons (see Table I). Compared to k for propyl- amine with nitrophenyl laurate, the corresponding k for lauroylpolyethylenimine is lo4 times greater. Such a comparison may not be fully appropriate if the low rate with ...