51974-46-0

Basic information

• Product Name: Benzene, 1,1'-(1-methoxy-2,2-dimethylpropylidene)bis-
• CAS NO: 51974-46-0
• Molecular Formula: C18H22O
• Molecular Weight: 254.372
• Mol File: 51974-46-0.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: Benzene, 1,1'-(1-methoxy-2,2-dimethylpropylidene)bis-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1,1'-(1-methoxy-2,2-dimethylpropylidene)bis-(51974-46-0)
• EPA Substance Registry System: Benzene, 1,1'-(1-methoxy-2,2-dimethylpropylidene)bis-(51974-46-0)

Safety Data

• Hazardous Substances Data: 51974-46-0(Hazardous Substances Data)

Upstream product

• 598-98-1 Methyl pivalate 
• 3282-30-2 pivaloyl chloride 
• 1657-60-9 2,2-dimethyl-1,1-diphenyl-propan-1-ol 
• 74-88-4 methyl iodide 
• 67-56-1 methanol 

Downstream Products

• 86943-05-7 2,2,5,5-tetramethyl-3,3,4,4-tetraphenyl-hexane 
• 1007-26-7 (2,2-dimethyl-1-propyl)benzene 
• 52044-03-8 3,3-dimethyl-2,2-diphenyl-butyric acid 
• 51974-44-8 tert-Butyl-3.3-dimethyl-2.2-diphenylperbutanoat 
• 51974-47-1 3.3-Dimethyl-2.2-diphenylbutanoyl-chlorid 

Relevant articles and documents

Carbanions 27. Rearrangements of (9-alkyl-9-fluorenyl)-methyllithium (or cesium) and 2,2-diphenyl-3,3-dimethyl-butyllithium

A study has been made upon the products from warming various (9-alkyl-9-fluorenyl)methyllithium (or cesium) compounds in THF to near 0°C followed by carbonation. When the 9-alkyl group is ethyl, the result is chiefly the protonated product (9-alkyl-9- fluorenyl)methane; a similar product evidently is formed when the 9-alkyl group is 1-norbornyl. When the 9-alkyl group is tert-butyl, the minor product is 9-neopentylfluorene-9-carboxylic acid from a [1,2]-migration of the tert-butyl group while the major product is 9-methylfluorene-9-carboxylic acid from an intramolecular elimination as shown by deuterium labeling. When the 9-alkyl is neopentyl, the major product is 9-neopentyl-9,10-dihydro-phenanthrene-9-carboxylic acid along with some 9-neopentylphenanthrene which becomes the major product in diethyl ether solution at 35°C. 2,2-Diphenyl-3,3-dimethylbutyllithium undergoes predominantly [1,2]-phenyl migration in THF at 0°C. From an x-ray crystal study upon 9-tert-butyl-9-(chloromethyl)fluorene and 9-neopentyl-9-(chloromethyl) fluorene, it is concluded that steric acceleration is responsible for the unusual reactions of (9-alkyl-9-fluorenyl)methyllithiums when the 9-alkyl groups are tert-butyl and neopentyl.