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:
Oct. 02, 2001
Filed:
Mar. 14, 2000
Tamotsu Kodama, Kurashiki, JP;
Naoko Ishihara, Kawasaki, JP;
Haruyuki Minoura, Kurashiki, JP;
Nobuhisa Miyake, Kurashiki, JP;
Setsuo Yamamatsu, Fuji, JP;
Asahi Kasei Kabushiki Kaisha, Osaka, JP;
Abstract
A method for acylating a hexakis (arylmethyl) hexaazaisowurtzitane (WB,) by reductively removing the arylmethyl groups in the presence of an acylating agent, characterized by contacting a WB,(a) with a heterogeneous system reduction catalyst (b) in the presence of an acylating agent (c) and a reducing agent (d) in a solvent (e) for the WB,(a) to reductively remove the arylmethyl groups from the WB,(a) and acylate the same, and by preventing the WB,(a) and the catalyst (b) from being contacted with each other when at least either of the acylating agent (c) and the reducing agent (d) is not present. In this method, the decomposition of the WB,skeleton, which readily occurs in the beginning of the acylation of the WB,as a starting material, can be highly effectively inhibited. This method can hence stably produce a tetraacylhexaazaisowurtzitane derivative in a high yield and is industrially advantageous.