Schering Corporation

Merck Sharp + Dohme Corp.

Jason L Winters

Xiaoyong Fu

Timothy L McAllister

Jianguo Yin

Agnes S Kim-Meade

Shuyi Zhang

Anantha R Sudhakar

Doris P Schumacher

Kenneth Stanley Matthews

Gerald Werne

Mathew Thomas Maust

Frank Bruno Guenter

Yianguo Yin

Timothy L Macallister

This application discloses a novel process for the preparation of 1,2-substituted 3,4-dioxo-1-cyclobutene compounds, which have utility, for example, in the treatment of CXC chemokine-mediated diseases, and intermediates useful in the synthesis thereof.

Process and intermediates for the synthesis of 1,2-substituted 3,4-dioxo-1-cyclobutene compounds

Disclosed is a process for making the compound of formula I: using the compounds of formulas II, Q, and XI or XII: wherein A is selected from the group consisting of Br, Cl and I (with Br being preferred); and R represents (C-C)alkyl. Also disclosed are intermediate compounds that are made in the disclosed process.

Synthesis of 2-Hydroxy-N,N-dimethyl-3-[[2-[[1(R)-(5-methyl-2-furanyl)propyl]amino]-3,4-dioxo-1-cyclobuten-1-yl]amino]benzamide

Synthesis of 2-hydroxy-n,n-dimethyl-3-[[2-[[1(r)-(5-methyl-2-furanyl)propyl]amino]-3,4-dioxo-1-cyclobuten-1-yl]amino]benzamide

Disclosed is a process for making the compound of formula I: using the compounds of formulas II, Q, and XI or XII: wherein A is selected from the group consisting of Br, Cl and I (with Br being preferred); and R represents (C&#x2013;C)alkyl. Also disclosed are intermediate compounds that are made in the disclosed process.

Synthesis of 2-hydroxy-N,N-dimethyl-3-[ [2-[1 (R)-(5-methyl-2-furanyl)propyl]amino]-3,4-dioxo-1-cyclobuten-1-yl]aminobenzamide

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East Windsor, NJ, United States of America

Jason L Winters