69604-12-2

Basic information

• Product Name: 4,4,5,5-tetramethyl-3-methylidenedihydrofuran-2(3H)-one
• CAS NO: 69604-12-2
• Molecular Formula: C₉H₁₄O₂
• Molecular Weight: 154.2063
• Mol File: 69604-12-2.mol
• Article Data: 7

Chemical Properties

• Boiling Point: 225.3°C at 760 mmHg
• Flash Point: 84.7°C
• Density: 0.97g/cm³
• Vapor Pressure: 0.0872mmHg at 25°C
• Refractive Index: 1.457
• CAS DataBase Reference: 4,4,5,5-tetramethyl-3-methylidenedihydrofuran-2(3H)-one(CAS DataBase Reference)
• NIST Chemistry Reference: 4,4,5,5-tetramethyl-3-methylidenedihydrofuran-2(3H)-one(69604-12-2)
• EPA Substance Registry System: 4,4,5,5-tetramethyl-3-methylidenedihydrofuran-2(3H)-one(69604-12-2)

Safety Data

• Hazardous Substances Data: 69604-12-2(Hazardous Substances Data)

Upstream product

• 77613-26-4 (4,4,5,5-Tetramethyl-2-oxo-tetrahydro-furan-3-yl)-acetic acid methyl ester 
• 113426-63-4 1,3,3-Trichloro-2-(2-chloro-1,1,2-trimethyl-propyl)-cyclopropene 
• 113426-68-9 2-Chloro-3-(2-chloro-1,1,2-trimethyl-propyl)-cycloprop-2-enone 
• 128071-60-3 4-Chloro-2-[1-chloro-meth-(E)-ylidene]-3,3,4-trimethyl-pentanoic acid 
• 128071-73-8 5-Chloro-4,4,5-trimethyl-hex-2-ynoyl chloride 
• 563-79-1 2,3-Dimethyl-2-butene 
• 72163-23-6 (Z)-dihydro-3-carbomethoxymethylene-4,4,5,5-tetramethyl-2(3H)-furanone 
• 72163-26-9 (E)-dihydro-3-carbomethoxymethylene-4,4,5,5-tetramethyl-2(3H)-furanone 
• 72163-16-7 dimethyl-3,3,4-trimethyl-1,4-pentadiene-1,2-dicarboxylate 
• 118652-84-9 2-Bromo-2,3-dimethyl-3-<(2-bromo-1-methoxy-2-propen-1-yl)oxy>butane 
• 118616-45-8 2-Bromo-2,3-dimethyl-3-<(1-methoxy-2-propyn-1-yl)oxy>butane 
• 118652-83-8 2-Bromo-2,3-dimethyl-3-(1,2-propadienyloxy)butane 
• 118652-82-7 2-Bromo-2,3-dimethyl-3-(2-propyn-1-yloxy)butane 
• 118616-49-2 2,2,3,3-Tetramethyl-4-methylene-5-methoxytetrahydrofuran 

Relevant articles and documents

Allenyl ethers as precursors of α-methylene-γ-butyrolactones and botryodiplodin derivatives

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Regio- and stereoselective ring-opening reactions of cyclopropenones: α-methylene-γ-butyrolactones via additions of trichlorocyclopropenylium ions to alkenes

The 2-chloro-3-(2'-chloroalkyl)cyclopropenones 4, readily obtained by hydrolysis of the adducts of the trichlorocyclopropenylium ion onto alkenes, thermally rearrange to propiolic acid chlorides 6. Treatment of 4 with TosOH·H2O in CH2/sub

A New Synthetic Route to β-Bromoprop-2-ynyl Mixed Acetals and Bromovinyl Bis-allyl Mixed Acetals, Precursors of α-Methylene-γ-Butyrolactones

Cohalogenation by N-bromosuccinimide in methanol of β-bromoallenyl ethers (3a-g) or allyl allenyl ethers (8d-f) affords unsaturated halogeno-compounds (5a-g) or (9d-f) which are converted via homolytic carbocyclization into α-methylene-γ-butyrolactones (7a-g).