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- W1972374727 abstract "Die Synthesen von α-Isocyanato- (2) und α-Isocyan-γ-butyrolacton (13) werden beschrieben. Das sehr reaktionsfähige Lacton-isocyanat 2 reagiert mit Alkoholen, Aminen und Phenyl-hydrazin zu Urethanen, Harnstoffen und Semicarbaziden, die in einem zweiten Schritt zu as-Triazinen und Hydantoinen umgesetzt werden können. α-Isocyan-γ-butyrolacton (13) läßt sich Basen-katalysiert unter Ringerweiterung zum 4-Äthoxycarbonyl-5.6-dihydro-4H-1.3-oxazin (16) umlagern. Die spektroskopischen Daten der erhaltenen Verbindungen werden beschrieben. Acyllactone Rearrangement, XLII. Synthesis and Rearrangement of α-Isocyanato- and α-Isocyano-γ-butyrolactone The synthesis of α-isocyanato- (2) and α-isocyano-γ-butyrolactone (13) is described. With alcohols, amines and phenylhydrazine the highly reactive lactone-isocyanate 2 forms smoothly urethanes, ureas and semicarbazides, which rearrange in a second step to form as-triazines and hydantoins. α-Isocyano-γ-butyrolactone (13) after basic cleavage of the γ-lactone ring undergoes rearrangement to 4-carbethoxy-5.6-dihydro-4H-1.3-oxazine (16). Spectroscopic data are given for all compounds described." @default.
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- W1972374727 date "1971-03-16" @default.
- W1972374727 modified "2023-10-18" @default.
- W1972374727 title "Acyl-lacton-Umlagerung, XLVII. Synthese und Umlagerung von α-Isocyanato- und α-Isocyan- γ-butyrolacton" @default.
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- W1972374727 doi "https://doi.org/10.1002/jlac.19717440107" @default.
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