Process for the preparation of oxadiazolines

Details Process for the preparation of oxadiazolines Process for the preparation of oxadiazolines

1976-07-01

1979-02-06

Rush, Raymond V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260562H, 568588, C07D27110

Patent

active

041384040

ABSTRACT:
Oxadiazoline derivatives of the formula: ##STR1## WHEREIN R is alkyl of 1 through 4 carbon atoms, which are useful as intermediates in the synthesis of oxadiazoline derivatives of the formula: ##STR2## WHEREIN R is as defined above the R.sub.1 is alkyl of 1 through 4 carbon atoms, possessing useful herbicidal properties, are prepared by a new process which comprises reducing the nitro group in a 5-alkyl-3-(2-nitro-4-chlorophenyl)-1,3,4-oxadiazolin-2-one of the formula: ##STR3## wherein R is as defined above to a hydroxylamino group, treating the resulting 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one with concentrated sulphuric acid of density about 1.83 to produce the corresponding amino-phenol, and converting the amine group in the resulting 5-alkyl-3-(2-amino-4-chloro-5-hydroxyphenyl)-1,3,4-oxadiazolin-2 -one to a chlorine atom. The 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one intermediates are new compounds.

REFERENCES:
patent: 3846439 (1974-11-01), Boesch et al.
Morrison et al. -- Organic Chemistry -- Allyn & Bacon, Inc. -- 1959 -- pp. 570-571.
Smith, P. A. S. -- Open-Chain Nitrogen Compounds -- vol. 2 -- W. A. Benjamin, Inc. -- 1966 -- p. 15.
Bamberger -- Chem. Ber. 27, pp. 1347, 1349-1350, 1548, 1552 (1894).

Affiliated with

Also associated with

Rating

Process for the preparation of oxadiazolines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of oxadiazolines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of oxadiazolines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-891046