CAS No.497-23-4,2(5H)-Furanone Suppliers,MSDS download

Detail of "497-23-4"

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CAS Number:

497-23-4

Name:

2(5H)-Furanone

Molecular Structure:

Formula:

C₄H₄O₂

Molecular Weight:

84.07

Synonyms:

Crotonicacid, 4-hydroxy-, g-lactone (6CI,7CI);2-Buten-4-olide;2-Butenoic acid,4-hydroxy-, g-lactone;2-Oxo-2,5-dihydrofuran;4-Hydroxy-2-butenoic acid lactone;5-Oxo-2,5-dihydrofuran-3-yl ester;Isocrotonolactone;g-Hydroxycrotonic acid lactone;

EINECS:

207-839-3

Density:

1.209 g/cm³

Melting Point:

4-5 °C(lit.)

Boiling Point:

203.7 °C at 760 mmHg

Flash Point:

87.3 °C

Hazard Symbols:

Risk Codes:

36/37/38

Safety:

26 Details

Reference

Synthesis of lignan lactones by conjugate addition of thioacetal carbanions to butenolide: Synthesis of lignan lactones by conjugate addition of thioacetal carbanions to butenolide. Pelter, Andrew; Ward, Robert S.; Satyanarayana, Panchagnula; Collins, Peter (Chem. Dep., Univ. Coll. Swansea, Swansea SA2 8PP, UK). J. Chem. Soc., Perkin Trans. 1, (3), 643-7 (English) 1983. CODEN: JCPRB4. ISSN: 0300-922X. DOCUMENT TYPE: Journal CA Section: 26 (Biomolecules and Their Synthetic Analogs) Section cross-reference(s): 1, 25, 27 The thioacetals I (R = SPh; R1 = R3 = OMe, R2 = R4 = H; R1R2 = OCH2O, R3 = R4 = OMe) (II, III, resp.), prepd. by conjugate addn.Several substances with their cas registry numbers 497-23-4 and 78473-72-0 may be metioned in this study. of the appropriate 3,4-R1R2C6H3C-(SPh)2 to butenolide followed by trapping with 3,4-R3R4C6H3CH2Br, were converted quant. to the corresponding dibenzyllactones I (R = H) (IV, V, resp.) by Raney Ni desulfurization. V is an antitumor lignan derived from Bursera schlechtendalii. Subsequent treatment of IV with BBr3 gave 76% enterolactone (I; R = R2 = R4 = H, R1 = R3 = OH). The adducts II and III cyclized to arylnaphthalene lactones on treatment with heavy metal salts. E.g., III cyclized to retrojusticidin B (VI) in 59% yield on treatment with Hg(O2CCF3)2 and O2 in THF at room temp. for 72 h. .

Butatriene by the thermolysis of 2-propynyl propiolate: Butatriene by the thermolysis of 2-propynyl propiolate. Bilinski, Vanda; Dreiding, Andre S.; Hollenstein, Hans (Org. Chem. Inst., Univ. Zurich, Zurich CH-8057, Switz.). Helv. Chim. Acta, 66(7), 2322-9 (German) 1983. CODEN: HCACAV. ISSN: 0018-019X. DOCUMENT TYPE: Journal CA Section: 23 (Aliphatic Compounds) Section cross-reference(s): 22, 27 Flow thermolysis of HCYCCO2CH2CYCH at 580° gave ~50% H2C:C:C:CH2 (I) and, as by-products, 4-methylene-2-cyclobuten-1-one, H2C:C(CHO)CYCH, HCYCCOCH:CH2, and H2C:CHCYCCHO (total 10%), along with some HCYCCHO, HCYCH, CO2, and CO. 624-67-9 and 497-23-4 are also in the experiment. In the same way, HCYCCO2CD2CYCH gave H2C:C:C:CD2 and small amts. of 4-(methylene-D2)-2-cyclobuten-1-one. A mechanism is proposed for these transformations. Thermolysis of HCYCCO2R (R = Me, Et) resulted in small yields of 2-buten-4-olide and 2-penten-4-olide, resp. 13C-NMR for I are reported. .

Detail of "497-23-4"

2(5H)-Furanone

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CAS No.497-23-4 2(5H)-Furanone

CAS No.497-23-4 2(5H)-Furanone

CAS No.497-23-4 2(5H)-Furanone

Reference