66448-77-9

Basic information

• Product Name: Naphthalene, 1,2,3,4-tetrahydro-2-methylene-
• CAS NO: 66448-77-9
• Molecular Formula: C11H12
• Molecular Weight: 144.216
• Mol File: 66448-77-9.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: Naphthalene, 1,2,3,4-tetrahydro-2-methylene-(CAS DataBase Reference)
• NIST Chemistry Reference: Naphthalene, 1,2,3,4-tetrahydro-2-methylene-(66448-77-9)
• EPA Substance Registry System: Naphthalene, 1,2,3,4-tetrahydro-2-methylene-(66448-77-9)

Safety Data

• Hazardous Substances Data: 66448-77-9(Hazardous Substances Data)

Upstream product

• 75074-58-7 4-phenyl-2-iodomethyl-1-butene 
• 75-05-8 acetonitrile 
• 75-09-2 dichloromethane 
• 530-93-8 1,2,3,4-tetrahydronaphthalen-2-one 
• 2717-44-4 2-methyl-3,4-dihydronaphthalene 

Relevant articles and documents

Dichloromethane activation. Direct methylenation of ketones and aldehydes with CH2Cl2 promoted by Mg/TiCl4/THF

(Chemical Equation Presented) This Mg-TiCl4-promoted CH 2-transfer reaction of CH2Cl2 represents an extremely simple, practical, and efficient methylenation of a variety of ketones and aldehydes, especially in enolizable or sterically hindered ketones such as 2,2-dimethylcyclohexanone, camphor, and fenchone.

The photochemical rearrangement of 1,2-dihydronaphthalenes into 1,4-dihydronaphthalenes induced by amines

The synthetic usefulness of the deprotonation/protonation reaction of excited 1,2-dihydronaphthalenes into 1,4-dihydronaphthalenes induced by amines has been investigated using 13 different substituted 1,2-dihydronaphthalenes and related compounds.The yield of the rearrangement ranges from 5 to 96percent.The formation of side-products depends on the position of protons in the substrate, which can be abstracted by the amine, and on competitive photoreactions.

Acid-Catalyzed Photoisomerization of 2-Alkylindenes to 2-Alkylideneindanes

Photolysis of 2-alkylindenes in aprotic media containing hydrochloric acid leads to the formation of 2-alkylideneindanes with concomitant quenching of the previously reported phototransposition reaction.Quantum efficiencies range from 0.02 to 0.1 and, as with the tranposition reaction, are highest for those indenes having short singlet lifetimes.Though there is evidence that the reaction is derived from the singlet excited state, acid has no effect on fluorescence and therefore intervenes by protonating an intermediate formed from S1.This intermediate (proposed as the bicyclopentene "I") is common to both the transposition and the olefin migration (cf.Scheme III).