Detail of "10008-73-8"

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CAS Number:
10008-73-8
Name:
2(3H)-Furanone,dihydro-5-methylene-
Molecular Structure:
Formula:
C₅H₆O₂
Molecular Weight:
98.0999
Synonyms:
4-Pentenoicacid, 4-hydroxy-, g-lactone (7CI,8CI);4,5-Dihydro-5-methylenefuran-2(3H)-one;4-Penten-4-olide;5-Methylenetetrahydro-2-furanone;Dihydro-5-methylenefuran-2(3H)-one;g-Methylene-g-butyrolactone;
EINECS:
233-004-8
Density:
1.07 g/cm³
Melting Point:
18 °C
Boiling Point:
186.7 °C at 760 mmHg
Flash Point:
76.7 °C
Appearance:
clear colourless to light yellow liquid
Hazard Symbols:
Xn
Risk Codes:
42/43
Safety:
23-36/37 Details

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GAMMA-METHYLENE-GAMMA-BUTYROLACTONE

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Preparing method and application of synthetic compound as bactericide and virucide: Preparing method and application of synthetic compound as bactericide and virucide. Hu, Xinyao; Wu, Yuehuan (Peop. Rep. China ). Faming Zhuanli Shenqing Gongkai Shuomingshu CN 1589623 A 9 Mar 2005,5 pp. (Chinese). (People's Republic of China).Chemicals with cas numbers 591-80-0 and 10008-73-8 also play role. CODEN: CNXXEV. CLASS: ICM: A01N043-08. APPLICATION: CN 2003-155987 29 Aug 2003. DOCUMENT TYPE: Patent CA Section: 5 (Agrochemical Bioregulators) Section cross-reference(s): 10 The synthetic compd. is prepd. by adding HgO in 4-pentenoic acid at molar ratio of 1:20-25, allowing to react at 40-70 ° for 0.5-1h, vacuum stilling at 0.01-0.1 atm. pressure to obtain g-methylene-g-butyrolactone. The 4-pentenoic acid is prepd. by adding sodium ethoxide and propargyl benzenesulfonate at the same amt., vacuum stilling at 0.01-0.1 atm. pressure to obtain a-propargyl di-Et malonate, refluxing in sodium hydroxide soln.(2-4 times of a-propargyl di-Et malonate) at 90-110 ° for 40-70 min, cooling, adjusting pH with HCl to 1, extg. with ether, drying with anhyd. Na2SO4 to obtain crude a-propargyl malonic acid, decarboxylating at 160-200 ° for 1-3h, vacuum stilling at 0.01-0.1 atm. pressure to obtain 4-pentenoic acid. The synthetic compd. can be prepd. into water miscible liq. or ethanol soln. and used as bactericide and virucide for human, environment, vegetable or tobacco. .

Cyclization of alkynecarboxylic acids: a route to an oxaspirolactone: Cyclization of alkynecarboxylic acids: a route to an oxaspirolactone. Yamamoto, Makoto; Yoshitake, Makoto; Yamada, Kazutoshi (Dep. Ind. Chem. 88928-52-3 and 10008-73-8 are also occured in this study., Chiba Univ., Chiba 260, Japan). J. Chem. Soc., Chem. Commun., (18), 991-2 (English) 1983. CODEN: JCCCAT. ISSN: 0022-4936. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 23 Treatment of HCYC(CH2)2CO2H with refluxing ROH (R = Me, Et, Bu) for 1 h in the presence of catalytic amts. of yellow HgO gave the corresponding alkoxyfuranones I (R as before) and, in the case of R = Bu, the methylene lactone II. II was obtained almost exclusively with ROH (R = CHMe2, CMe3). Cyclization of HO(CH2)3CYC(CH2)2CO2H in refluxing DMF contg. HgO for 2 h gave 73% of the dioxaspiro compd. III. .