76794-11-1

Basic information

• Product Name: (Z)-2,2,6,6-Tetramethyl-5-[(triphenyl-λ⁵-phosphanylidene)-methyl]-hept-4-en-3-one
• CAS NO: 76794-11-1
• Molecular Weight: 442.581
• Mol File: 76794-11-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: (Z)-2,2,6,6-Tetramethyl-5-[(triphenyl-λ⁵-phosphanylidene)-methyl]-hept-4-en-3-one(CAS DataBase Reference)
• NIST Chemistry Reference: (Z)-2,2,6,6-Tetramethyl-5-[(triphenyl-λ⁵-phosphanylidene)-methyl]-hept-4-en-3-one(76794-11-1)
• EPA Substance Registry System: (Z)-2,2,6,6-Tetramethyl-5-[(triphenyl-λ⁵-phosphanylidene)-methyl]-hept-4-en-3-one(76794-11-1)

Safety Data

• Hazardous Substances Data: 76794-11-1(Hazardous Substances Data)

Upstream product

• 35606-00-9 (4Z)-5-(bromo-methyl)-2,2,6,6-tetramethylhept-4-en-3-one 
• 21451-78-5 (E)-2,2,5,6,6-pentamethylhept-4-en-3-one 
• 76807-40-4 (5,5-dimethyl-2-tert-butyl-4-oxohex-2-enyl)triphenylphosphonium bromide 

Relevant articles and documents

tert-Butyl-Substituted Cyclooctatetraenes

Reaction of cyclooctatetraene (COT) with tert-butyllithium provides a convenient synthesis of tert-butylcyclooctatetraene, 4.As a byproduct of the reaction mixture, 1,4-di-tert-butylcyclooctatriene has been isolated and converted to 1,4-di-tert-butylcyclooctatetraene, 5, by deprotonation with potassium amide and oxidation with iodine.An independent synthesis of 5 was developed from 9-oxabicycloocta-2,4,6-triene (cyclooctatetraene oxide), 9.The highly substituted compound 1,3,5,7-tetra-tert-butylcyclooctatetraene (6) has been prepared in 24percent overall yield in four steps.The acetylenic ketone 27, prepared from (tert-butylethynyl)copper and pivaloyl chloride, undergoes condensation with dimethyl malonate to give the pyrone ester 28.This ester undergoes facile hydrolysis and decarboxylation in hot concentrated sulfuric acid to yield 4,6-di-tert-butyl-2H-pyran-2-one (22) which is converted to 6 in one step by photolysis in dilute solution.