MANUFACTURE OF 22OXOODIHYDROBENZO*D**1*33 OXAZINE

Title:

MANUFACTURE OF 22OXOODIHYDROBENZO*D**1*33 OXAZINE

Document Type and Number:

Japanese Patent JPS5673049

Kind Code:

A

Abstract:

A process for preparing 2-oxo-dihydrobenzo[d][1,3]oxazines (also named 1,4-dihydro-2H-3,1-benzoxazin-2-ones) which process comprises treating a suspension or solution of a 2-carbamoyl-benzyl alcohol in a substantially water-immiscible organic medium with aqueous alkaline hypochlorite or hypobromite having a pH of at least 11 in the presence of a phase transfer catalyst; and conversion of the 2-oxo-dihydrobenzo[d][1,3]oxazines to corresponding 2-amino-benzyl alcohols which are useful as intermediates in the production of dyes, pharmaceuticals and herbicides.

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Inventors:

JIYON GURAHAMU SOOPU
PIITAA JIYOOJI AABEN

Application Number:

JP13415180A

Publication Date:

June 17, 1981

Filing Date:

September 26, 1980

Export Citation:

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Assignee:

STERLING DRUG INC

International Classes:

C07C67/00; C07C213/00; C07C215/68; C07C217/84; C07C219/34; C07C231/00; C07C231/12; C07C233/43; C07D265/18; (IPC1-7): C07C89/00; C07C91/40; C07C93/14; C07C93/26; C07C103/365; C07D265/18

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