Detail of "7331-52-4"

CAS Number:
7331-52-4
Name:
2(3H)-Furanone,dihydro-4-hydroxy-, (4S)-
Superlist Name:
(S)-3-Hydroxy-gamma-butyrolactone
Molecular Structure:
Formula:
C₄H₆O₃
Molecular Weight:
102.09 .
Synonyms:
2(3H)-Furanone,dihydro-4-hydroxy-, (S)-;Butyric acid, 3,4-dihydroxy-, g-lactone, D-glycero- (8CI);(3S)-Hydroxy-g-butyrolactone;(S)-(-)-b-Hydroxy-g-butyrolactone;(S)-3-Hydroxy-g-butyrolactone;(S)-3-Hydroxybutyrolactone;(S)-b-Hydroxy-g-butyrolactone;
Density:
1.393 g/cm³
Boiling Point:
310.3 °C at 760 mmHg
Flash Point:
157 °C
Appearance:
Colorless to light yellow liquid
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
26-36-37/39 Details

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Continuous preparation method of (S)-b-hydroxy-g-butyrolactone with high optical purity: Continuous preparation method of (S)-b-hydroxy-g-butyrolactone with high optical purity. Jung, Gi Nam; Kim, Jin Ung; Kim, Tae Yun; Ko, Gi Ho; Kwak, Byeong Seong; Lee, Sang Il (SK Corporation, S. Korea). Repub. Korean Kongkae Taeho Kongbo KR 2003004902 A 15 Jan 2003, No pp. given (Korean). (Korea, Republic Of). CODEN: KRXXA7. CLASS: ICM: C07D307-33. APPLICATION: KR 2001-40651 7 Jul 2001. DOCUMENT TYPE: Patent CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) An economical prepn. method of (S)-b-hydroxy-g-butyrolactone is provided to environment friendly produce an optically pure compd. in higher yield and purity than usual methods. The compd.Several substances with their cas registry numbers 7331-52-4 and 90414-36-1 may be metioned in this study. is widely used as an intermediate for drugs, pesticides, food additives and fragrant materials. The prepn. method of (S)-b-hydroxy-g-butyrolactone characteristically comprises reaction of inorg. carriers impregnated in noble-metal catalyst in a reactor at the reaction temp. of 50-500°, under the reaction pressure of 15-5500 psig and with 0.1-10 h%-1 of WHSV, wherein the mole ratio of hydrogen to carboxylic acid deriv. is 2-, the content of carboxylic acid in a solvent is 2-50 wt.%, org. acids or inorg. acids are added to the solvent as additives, methyl-dihydroxy-butyric acid ester is cyclized in the presence of acid catalyst. .