Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.3657/DEL/2011 A
(19) INDIA
(22) Date of filing of Application :15/12/2011 (43) Publication Date : 21/06/2013
(54) Title of the invention : A NEW ORGANOCATALYTIC SYNTHESIS OF CHIRAL PYRAZOLIDINES AND THEIR
ANALOGUES
(51) International classification :C07D
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No :NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(71)Name of Applicant :
1)COUNCIL OF SCIENTIFIC & INDUSTRIAL
RESEARCH
Address of Applicant :ANUSANDHAN BHAWAN, RAFI
MARG, NEW DELHI-110001, INDIA
(72)Name of Inventor :
1)BOOPATHI SENTHIL KUMAR
2)VAITHIYANATHAN
VENKATARAMASUBRAMANIAN
3)ARUMUGAM SUDALAI
(57) Abstract :
This invention relates to a highly enantio- and diastereoselective synthesis of functionalised pyrazolidines via tandem a-
amination-Corey Chaykovsky reaction of aldehydes.The reaction allows the creation of three covalent bonds and two contiguous
chiral centers in excellent enantio and diastereoselectivity with highly atom-economic transformation in a single step.
No. of Pages : 14 No. of Claims : 6
The Patent Office Journal 21/06/2013 13454