
TY  - JOUR
A1  - Crow, WD 
A1  - McNab, H 
T1  - Synthetic applications of intramolecular insertion in arylcarbenes. V <I>o</I>-Benzyl, phenylamino, phenoxy and phenylthio phenylcarbenes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1981
VL  - 34
IS  - 5
SP  - 1037
EP  - 1050
KW  - 
UR  - https://doi.org/10.1071/CH9811037 
N2  - The 2-(XC6H4)-substituted phenylcarbenes in which X = CH2, NH, O and S have been generated and pyrolysed in the gas phase at low pressure. When X = CH2 or NH, the main reaction is simple insertion into the adjacent o-position of the XC6H5 ring to give dihydroanthracenes and dihydroacridines respectively. The use of substituents shows that no spiro diene rearrangement is involved in the case X = NH. For X = O or S, on the other hand, the carbene inserts into the &#960;-system ofthe XC6H5 ring and expansion occurs to give benzo[b]cyclohepta[d]furans and thiophens. 
ER  -

