Patent EP0039477A1 successfully refreshed from Google Patents.
EP0039477A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Use of 1,3-Dioxolen-2-one derivatives
Assignee: Kanebo Ltd
•
Filing: 1981-04-29
•
Granted: —
•
Expires: 2001-04-29
Abstract
Abstract A 1,3-dioxolen-2-one derivative of the general formula wherein R, represents a hydrogen atom, a methyl group, or an aryl group, R, represents a hydrogen atom, or may be taken together with R, to form a divalent carbon chain residue, and X represents a halogen atom. The above compound can be prepared by reacting a compound of the general formula with a halogenating agent, and is useful as protective group-introducing reagents for introducing protective groups into reagents in various chemical reactions, or as modifiers for prodrug preparation in medicine.
Inventors
- 👤 Fumio Sakamoto
- 👤 Shoji Ikeda
- 👤 Goro Tsukamoto
- 👤 Isamu Utsumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:54
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46; A; A61; A61P; A61P31/00; A61P31/04; A61P43/00; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34; C07D317/40; C07D317/44; C07D317/46; C07D317/48; C07D317/62; C07D317/64; C07D499/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A process for producing a 1,3-dioxolen-2-one derivative of the general formula wherein R 1 represents a hydrogen atom, a methyl group, or an aryl group, R 2 represents a hydrogen atom or may be taken together with R 1 to form a divalent carbon chain residue, and X represents a halogen atom, which comprises reacting a compound of the general formula wherein R 1 and R 2 are as defined above, with a halogenating agent.
Claim 2
Dependent Claim
75 words
A process for producing a 1,3-dioxolen-2-one derivative of the general formula wherein R 1 represents a hydrogen atom, a methyl group, or an aryl group, R 2 represents a hydrogen atom or may be taken together with R 1 to form a divalent carbon chain residue, and X represents a halogen atom, which comprises reacting a compound of the general formula wherein R 1 and R 2 are as defined above, with a halogenating agent.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the halogenating agent is an allylic halogenating agent.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein the allylic hydrogenating agent is N-bromosuccinimide, N-chlorosuccinimide, N-bromophthalimide, N-chlorophthalimide, bromine, or chlorine.
Claim 5
Dependent Claim
22 words
The process of any one of claims 1 to 3 wherein the reaction is carried out in an aprotic inert organic solvent.
Claim 6
Dependent Claim
18 words
5 . The process of claim 4 wherein the organic solvent is a hydrocarbon or a halogenated hydrocarbon.
Claim 7
Dependent Claim
23 words
The process of any one of claims 1 to 5 wherein the reaction is carried out in the presence of a radical generator.
Claim 8
Dependent Claim
20 words
The process of any one of claims 1 to 6 wherein the reaction is carried out under irradiation of ultraviolet.
Claim 9
Dependent Claim
31 words
The process of any one of claims 1 to 7 wherein the reaction is carried out at a temperature ranging from room temperature to the refluxing temperature of the reaction system.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.