EP0140437A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Substituted azetidine derivatives, process for their preparation, and their use as intermediates
Assignee: Shell Internationale Research Maatschappij BV
•
Filing: 1984-10-11
•
Granted: —
•
Expires: 2004-10-11
Abstract
Abstract Substituted azetidine derivatives of formula in which R 1 represents a methyl group substituted by at least one phenyl group; and R 2 represents a chlorine or bromine atom or a hydroxy or alkanoyloxy group of up to 6 carbon atoms, processes for their preparation and their use as intermediates for the preparation of azetidine-3-carboxylic acid derivatives.
Inventors
- 👤 Derek Alexander Wood
- 👤 Ronald Frank Mason
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:26
CPC Classifications
C; C07; C07D; C07D205/00; C07D205/02; C07D205/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
41 words
Substituted azetidine derivatives of formula: in which R 1 represents a methyl group substituted by at least one phenyl group; and R 2 represents a chlorine or bromine atom or a hydroxy or alkanoyloxy group of up to 6 carbon atoms.
Claim 2
Dependent Claim
41 words
Substituted azetidine derivatives of formula: in which R 1 represents a methyl group substituted by at least one phenyl group; and R 2 represents a chlorine or bromine atom or a hydroxy or alkanoyloxy group of up to 6 carbon atoms.
Claim 3
Dependent Claim
29 words
Substituted azetidine derivatives as claimed in claim 1, in which R 1 represents a benzyl group and R 2 represents a chlorine atom or a hydroxy or acetoxy group.
Claim 4
Dependent Claim
57 words
A process for the preparation of substituted azetidine derivatives as claimed in claim 1, in which R 2 represents a chlorine or bromine atom, which comprises reacting a compound of formula: in which X and Y each individually respresents a chlorine or bromine atom, with a primary amine of formula: in the presence of an inorganic base.
Claim 5
Dependent Claim
53 words
A process for the preparation of substituted azetidine derivatives as claimed in claim 1 in which R 2 represents an alkanoyloxy group of up to 6 carbon atoms, which comprises reacting the corresponding compound of formula I in which R 2 represents a chlorine or bromine atom with the appropriate alkali metal alkanoate.
Claim 6
Dependent Claim
50 words
A process for the preparation of substituted azetidine derivatives as claimed in claim 1, in which R 2 represents a hydroxy group, which comprises reacting the corresponding compound of formula I in which R 2 represents an alkanoyloxy group of up to 6 carbon atoms, with an alkali metal hydroxide.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 3, 4 or 5, substantially as hereinbefore described with reference to Examples l(b), 2 or 3 respectively.
Claim 8
Dependent Claim
24 words
Substituted azetidine derivatives as claimed in claim 1 when prepared by a process as claimed in any one of the claims 3 to 6.
Claim 9
Dependent Claim
23 words
The use of substituted azetidine derivatives as claimed in claim 1, 2 or 7 as intermediates for the preparation of azetidine-3-carboxylic acid derivatives.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.