New and Practical Method for Synthesis of 1- and 1,3-Substituted Xanthines
作者:Ilia A. Zavialov、Vilas H. Dahanukar、Hoa Nguyen、Cecilia Orr、David R. Andrews
DOI:10.1021/ol049272n
日期:2004.6.1
[reaction: see text] A new and practical method for the synthesis of 1- and 1,3-substituted xanthines is reported. Direct base-promoted condensation of the imidazole precursor 1 with carbamates 2 gives 1-substituted 7-PMB xanthines 7 in good yields. Alkylation of these derivatives or their potassium salts proceeds under mild conditions to give functionalized 1,3-substituted 7-PMB xanthines 9 in good
[EN] PROCESS FOR PREPARING XANTHINE PHOSPHODIESTERASE V INHIBITORS AND PRECURSORS THEREOF<br/>[FR] PROCEDE DE PREPARATION D'INHIBITEUR DE LA PHOSPHODIESTERASE V DE LA XANTHINE
申请人:SCHERING CORP
公开号:WO2003101992A1
公开(公告)日:2003-12-11
A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound (5) without intermediate purifications or separations, a dihalogenation step to synthesize Compound (7), and a coupling reaction to produce Compound (9).
Process for preparing xanthine phosphodiesterase V inhibitors and precursers thereof
申请人:Dahanukar H. Vilas
公开号:US20060205943A1
公开(公告)日:2006-09-14
A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound 5 without intermediate purifications or separations, a dihalogenation step to synthesize Compound 7, and a coupling reaction to produce Compound 9.
Process for preparing xanthine phosphodiesterase v inhibitors and precursors thereof
申请人:SCHERING CORPORATION
公开号:EP1719772A1
公开(公告)日:2006-11-08
A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound 5 without intermediate purifications or separations, a dihalogenation step to synthesize Compound 7, and a coupling reaction to produce Compound 9.
一种制备黄嘌呤磷酸二酯酶 V 抑制剂的工艺,以及在所述工艺中使用的化合物。该工艺包括无需中间纯化或分离即可高效合成化合物 5 的五步方法、合成化合物 7 的二卤化步骤以及生成化合物 9 的偶联反应。
PROCESS FOR PREPARING XANTHINE PHOSPHODIESTERASE V INHIBITORS AND PRECURSORS THEREOF