6-disubstituted-3(2H)-benzofuranone derivatives. It was found that depending on the reaction conditions, degradation products or the products of oxidation were isolated. This latter reaction became the main process when the ring closure was performed starting from methoxy- or 2-propoxy-desoxybenzoin and diethyl bromo-(or chloro-)-malonate to give d,l- and meso-dimers of the substituted 3(2H)-benzofuranones.
Novel urea (thiourea) derivative and thermal recording sheet using same
申请人:NIPPON PAPER INDUSTRIES CO., LTD.
公开号:EP0699662B1
公开(公告)日:1998-10-21
Piperidine-triazine compounds for use as stabilizers for organic materials
申请人:CIBA-GEIGY AG
公开号:EP0395584B1
公开(公告)日:1996-06-26
Thermally sensitive recording medium
申请人:NIPPON PAPER INDUSTRIES CO., LTD.
公开号:EP0993965B1
公开(公告)日:2004-03-31
Thermochromic Dental Material
申请人:Brown William Steven
公开号:US20140004071A1
公开(公告)日:2014-01-02
The present invention includes a thermochromic dental material comprising a polymeric dental composition; and a temperature sensitive thermochromic dye in contact with the polymeric dental composition, wherein the temperature sensitive thermochromic dye is colorless at body temperature and undergoes a reversible color change at a temperature of between 99-160° F.