949-41-7

Basic information

• Product Name: 1a,9b-dihydro-1H-cyclopropa[l]phenanthrene
• Synonyms: 1a,9b-Dihydro-1H-cyclopropa[l]phenanthrene; 1H-Cyclopropa(l)phenanthrene, 1a,9b-dihydro-
• CAS NO: 949-41-7
• Molecular Formula: C₁₅H₁₂
• Molecular Weight: 192.2558
• Mol File: 949-41-7.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 327.5°C at 760 mmHg
• Flash Point: 159.3°C
• Density: 1.166g/cm³
• Vapor Pressure: 0.000384mmHg at 25°C
• Refractive Index: 1.663
• CAS DataBase Reference: 1a,9b-dihydro-1H-cyclopropa[l]phenanthrene(CAS DataBase Reference)
• NIST Chemistry Reference: 1a,9b-dihydro-1H-cyclopropa[l]phenanthrene(949-41-7)
• EPA Substance Registry System: 1a,9b-dihydro-1H-cyclopropa[l]phenanthrene(949-41-7)

Safety Data

• Hazardous Substances Data: 949-41-7(Hazardous Substances Data)

Upstream product

• 219-92-1 dibenzocycloheptene 

Downstream Products

• 24471-57-6 9-bromomethylphenantrene 
• 18964-38-0 (RS)-3-(methoxymethyl)cyclohex-1-ene 
• 181657-77-2 cis-2-Bicyclo[4.1.0]heptylmethylaether 
• 883-20-5 9-methylphenanthrene 

Relevant articles and documents

Excited state carbon acid dissociation and competing photoarrangements of 5H-dibenzo[a,c]cycloheptene derivatives

Structure reactivity studies of excited singlet state carbon acid dissociation and competing formal di-π-methane rearrangement have been carried out to gain more insights on the photochemistry displayed by these compounds. Photolysis in the presence of ethanolamine resulted in stereoselective deprotonation of the pseudo-axial proton. The results show that excited state carbon acid dissociation is a general reaction of dibenzo and dinaphtho cycloheptenes only if photochemical pathways are not competing.

Approaches to 1H-Cyclopropaphenanthrenes. Eliminations with 1a,9b-Dihydro-1H-cyclopropaphenanthrene Derivatives

Base-induced elimination of the sulfonium salt 2i in the presence of furan affords the addition products 7 and 8, derived from 1H-cyclopropaphenathrene (1) and the isomeric cyclopropene 5a (Scheme 3).Upon oxidation, the selenide 2c yields phenanthrene-9-methanol (9), presumably via 1.No evidence for the intermediate 1 is obtained from sulfoxide pyrolysis with 2e, which leads to products formed by radical pathways (Scheme 5).Reductive elimination of the disulfone 3b gives half-reduction to monosulfone 2g and complete reduction to cyclopropane 2 as well as 9-methylphenanthrene (15), but no evidence for the intermediate 1.