Title:
PRODUCTION OF OXAZINE DERIVATIVE
Document Type and Number:
Japanese Patent JP3810820
Kind Code:
B2
Abstract:
PURPOSE: To stably obtain in high purity and yield an oxazine derivative having photochromic characteristics by subjecting a hydroxynitroso derivative and a basic substance to a 2-methyleneindoline derivative in the presence of water.
CONSTITUTION: This compound, an oxazine derivative, of formula III is obtained by subjecting a compound of formula II (B-ring is a (substituted) aromatic ring) and a basic substance [e.g. an alkali(alkaline earth) metal hydroxide, triethylamine, piperidine, pyridine] to a compound of formula I [R1 is a (substituted)alkyl, (substituted)alkoxyalkyl, (substituted)alkenyl, (substituted) cycloalkyl or (substituted)aryl; R2 and R3 are each an (alkoxy)alkyl, etc.; R4 is H, an alkyl, phenyl or amino; A-ring is the same as B-ring] in the presence of water. It is preferable that the amount of the water to be used be 0.1-100wt. times that of the compound of formula II.
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Inventors:
Utsunomiya Akira
Hiroshi Yamaga
Nobuo Suzuki
Hiroshi Yamaga
Nobuo Suzuki
Application Number:
JP24486894A
Publication Date:
August 16, 2006
Filing Date:
September 14, 1994
Export Citation:
Assignee:
Hodogaya Chemical Co., Ltd.
International Classes:
C07D498/10; C09B57/00; C09K9/02; (IPC1-7): C07D498/10; C09B57/00; C09K9/02
Domestic Patent References:
| JP63301885A | ||||
| JP61165388A |
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