Method for prepn. and purification of phosphine oxide

Application Number: 00119209Application Date: 2000.04.13Publication Number: 1277968Publication Date: 2000.12.27Priority Information: 1999/4/13 JP 105431/99International: C07F9/53Applicant(s) Name: Mitsui Chemicals, Inc.Address: Inventor(s) Name: Masu Tadahito;Gen Isao;Funaki KatsuhikoPatent Agency Code: 72001Patent Agent: zhou huiminAbstract The invention provides a process for preparing phosphine oxides comprising reacting iminophosphoranes with phosphorus oxytrichloride by which highly purified phosphine oxides can be obtained industrially Read more

External compensation method of atropisomerism bis (phosphine oxide) compound

Application Number: 00120417Application Date: 2000.07.07Publication Number: 1281860Publication Date: 2001.01.31Priority Information: 1999/7/9 EP 99113306.7International: C07F9/53;C07F13/00Applicant(s) Name: F. Hoffmann-La Roche & Co. AGAddress: Inventor(s) Name: F. Chitzler;M. Ralohde;R. SchmiedPatent Agency Code: 11038Patent Agent: du jingyangAbstract The present invention is concerned with a novel process for the racemization of atropisomeric bisphosphine oxide compounds of formula I in their Read more

Sulfonic acid-containing organic phosphine carboxylic acid compound and its prepn. and application

Application Number: 00107482Application Date: 2000.05.19Publication Number: 1324797Publication Date: 2001.12.05Priority Information: International: C02F5/14;C07F9/53Applicant(s) Name: China Petrochemical Group Corp.Address: Inventor(s) Name: Li Bengao;Wang ZhenyuPatent Agency Code: 72001Patent Agent: xu shuAbstract The present invention relates to an organophosphine carboxlic acid compound containing sulfonic acid. This invention provides its structure formula, and the said compound can be used as Read more

Vitamin D precursor of phosphine oxide

Application Number: 00106087Application Date: 2000.04.20Publication Number: 1276376Publication Date: 2000.12.13Priority Information: 1999/4/22 US 60/130,451International: C07C43/192;C07C401/00;C07F9/28Applicant(s) Name: F. Hoffmann-La Roche AGAddress: Inventor(s) Name: M. M. KabatPatent Agency Code: 11021Patent Agent: hu jiaoyuAbstract A process for producing a compound of the formula 1: where Ph is phenyl, X<1> and X<2> are both hydrogen or X<1> and X<2> taken Read more