A Practical Synthesis of Multitargeted Antifolate LY231514
摘要:
A concise and scalable synthesis of LY231514 (1), a new pyrrolo[2,3-d]pyrimidine-based antitumor agent, is presented. Reaction of 2-bromo-4-arylbutanal 9 with 2,4-diamino-6-hydroxypyrimidine (10) regioselectively provided pyrrolo[2,3-d] pyrimidine 11, representing the core structure of the drug, in good yield. Assimilation of the glutamic acid residue by conventional means completed the synthesis. Development of the optimized synthetic route emphasized avoiding isolation of the relatively unstable aldehyde and bromoaldehyde intermediates.
Novel &Dgr;
1
-pyrrolines of the formula (I)
1
in which
Ar
1
, Ar
2
and Q are each as defined in the description,
a plurality of processes for preparing these substances and their use for controlling pests.
Crystalline forms of pemetrexed diacid and processes for the preparation thereof
申请人:Busolli Jonathan
公开号:US20080045711A1
公开(公告)日:2008-02-21
Provided are crystalline forms of N-[4-[2-(2-amino-4,7-dihydro-4-oxo-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic acid, pemetrexed diacid, and processes for the preparation thereof.
Determination of the Source of the <i>N</i>-Methyl Impurity in the Synthesis of Pemetrexed Disodium Heptahydrate
作者:Douglas P. Kjell、Dallas W. Hallberg、J. Michael Kalbfleisch、Cynthia K. McCurry、Michael J. Semo、Edward M. Sheldon、Jeremy T. Spitler、Ming Wang
DOI:10.1021/op0498013
日期:2005.11.1
The synthesis of PemetrexedDisodium Heptahydrate has consistently resulted in a very low level (ca. 0.02%) unknown impurity. To ensure long-term control, the identity and source of the impurity were desired. Isolation and characterization identified the impurity as the N-methyl derivative. The source was identified as the methyl groups on the peptide coupling agent, 2,6-Dimethoxy-1,3,5-triazine (CDMT)
METHOD FOR PREPARING AN INTERMEDIATE FOR PRODUCING HIGH-PURITY PEMETREXED AND METHOD FOR PRODUCING HIGH-PURITY PEMETREXED USING THE INTERMEDIATE
申请人:SAMYANG BIOPHARMACEUTICALS CORPORATION
公开号:US20160214987A1
公开(公告)日:2016-07-28
Disclosed are a method for preparing an intermediate for producing high-purity pemetrexed and a method for producing high-purity pemetrexed using the intermediate, and more specifically, a method for preparing pemetrexed diethyl ester, which is an intermediate for producing pemetrexed, or a salt thereof with high purity, and to a method for producing pemetrexed disodium salt with high purity using the intermediate.