Online article for Non-subscribers

Pay per view

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact:

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

Paper | Regular issue | Vol 55, No. 4, 2001, pp.689-704
Published online, 1st January, 1970
DOI: 10.3987/COM-00-9148
Synthesis of 2-Phenyloxazole Derivatives Containing Amino Acids as Insulin Sensitivity Enhancers for Treatment of Type II Diabetes

Margaret M. Faul,* Leonard L. Winneroski, Jeremy S. York, Matt R. Reinhard, Richard C. Hoying, William H. Gritton, and Samuel J. Dominianni

*Lilly Reserach Laboratories, A Division of Eli Lilly and Company, Chemical Process Research and Development Division, Indianapolis, IN 46285-4813, U.S.A.


The search for Insulin Sensitivity Enhancers (ISE) for use in the treatment of Non-Insulin Dependent Diabetes Mellitus (NIDDM) has led to the preparation of N-[(phenylmethoxy)carbonyl]-O-[[4-[2-(2-phenyl-4-oxazolyl)-ethoxy]phenyl]methyl]-L-serine (1) and 7-[2-(2-phenyl-4-oxazolyl)ethoxyl]-L-1,2,3,4-tetrahydro-N-Cbz-isoquinoline-3-carboxylic acid (2), that contain a 2-phenyloxazole moiety linked to an amino acid in place of the 2,4-thiazolidinedione pharmacophore. The 2-phenyloxazole was incorporated into 1 and 2 in high yield by alkylation of 4-hydroxybenzaldehyde or methyl 7-1,2,3,4-tetrahydro-N-benzyloxycarbonyl-hydroxyisoquinoline-3-carboxylate with 2-(2-phenyl-4-oxazolyl)ethyl p-toluenesulfonate (16). Successful incorporation of serine into 1 required use of an N-trityl protecting group to minimize β-elimination and epimerization at the α-center.