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1. (WO2002002486) PROCESS FOR THE PREPARATION OF POLYHYDRIC ALCOHOLS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/002486    International Application No.:    PCT/JP2001/005829
Publication Date: 10.01.2002 International Filing Date: 05.07.2001
IPC:
C07B 41/02 (2006.01), C07C 37/055 (2006.01), C07D 213/69 (2006.01), C07D 309/30 (2006.01), C07J 1/00 (2006.01)
Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY [JP/JP]; 1-3-1, Kasumigaseki Chiyoda-ku, Tokyo 100-8921 (JP) (For All Designated States Except US).
OTSUKA CHEMICAL CO., LTD. [JP/JP]; 2-27, Otedori 3-chome, Chuo-ku Osaka-shi, Osaka 540-0021 (JP) (For All Designated States Except US).
KATO, Syunsaku [JP/JP]; (JP) (For US Only).
SUZUKI, Daisuke [JP/JP]; (JP) (For US Only).
SEO, Yoshiko [JP/JP]; (JP) (For US Only)
Inventors: KATO, Syunsaku; (JP).
SUZUKI, Daisuke; (JP).
SEO, Yoshiko; (JP)
Agent: SAEGUSA, Eiji; Kitahama TNK Building 1-7-1, Doshomachi, Chuo-ku Osaka-shi, Osaka 541-0045 (JP)
Priority Data:
2000-203433 05.07.2000 JP
Title (EN) PROCESS FOR THE PREPARATION OF POLYHYDRIC ALCOHOLS
(FR) PREPARATION DE POLYALCOOLS
Abstract: front page image
(EN)A process for the preparation of polyhydric alcohols which comprises subjecting a polyhydric alcohol whose hydroxyl groups are protected to irradiation with microwave in the presence of either a basic compound or an acid exhibiting at 25°C an acid dissociation constant (pKa) of -8 to 3 to thereby conduct deblocking. According to this process, polyhydric alcohols whose hydroxyl groups are protected can be easily deblocked to thereby attain industrially advantage preparation of polyhydric alcohols.
(FR)L'invention concerne un procédé permettant la préparation de polyalcools. Ce procédé consiste à exposer un polyalcool dont les groupes hydroxyle sont protégés à une irradiation par micro-ondes en présence soit d'un composé basique, soit d'un acide dont la constante de dissociation acide (pKa) à une température de 25 °C est comprise entre 8 et 3, afin de produire un déblocage. Ce procédé permet de débloquer aisément des polyalcools dont les groupes hydroxyle sont protégés afin de préparer des polyalcools avantageux pour les applications industrielles.
Designated States: JP, KR, US.
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)