The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2015
Filed:
Oct. 02, 2013
Viiv Healthcare Company, Research Triangle Park, NC (US);
Shionogi & Co., Ltd., Osaka, JP;
Brian Alvin Johns, Research Triangle Park, NC (US);
Jason Gordon Weatherhead, Research Triangle Park, NC (US);
Toshikazu Hakogi, Osaka, JP;
Yasunori Aoyama, Osaka, JP;
ViiV Healthcare Company, Research Triangle Park, NC (US);
Shionogi & Co., Ltd., Osaka, JP;
Abstract
The present invention features a process for the preparation of 4-oxo-3-[(phenylmethyl)oxy]-4-H-pyran-2-carboxylic acid, an intermediate useful in the synthesis of HIV integrase inhibitors. The process involves (a) treating a compound of formula P-2 with lithium bis(trimethylsilyl)amide and benzaldehyde to form a compound of formula P-3, (b) treating the compound of formula P-3 with triethylamine and methanesulfonyl chloride followed by N-methyl-2-pyrrolidone and 1,8-diazabicyclo[5.4.0]undec-7-ene to form a compound of formula P-4, and (c) treating the compound of formula P-4 with RuCland NaIOto form the compound of formula P-5.