Reaction of naphthalene with bis(methoxycarbonyl)carben(2) produced thermally from dimethyl diazomalonate (1) gives 7,7-bis(methoxycarbonyl)-2,3-benzobicyclo[4.1.0]-hepta-2,4-diene (4), dimethyl (1-naphthyl)malonate (5), dimethyl 2,3-bis(methoxycarbonyl)fumarate (6), the azine 7, 5,5,8,8-tetrakis(methoxycarbonyl)-2,3-benzotricyclo[5.1.0.0(4,6)]oct-2-ene (8), 7,7-bis(methoxycarbonyl)-3,4-benzotropilidene (9) and the two dimers, 10 and 11. Product 9 represents the first time a carbene has been observed to add to the 2,3-bond of naphthalene. The Wolff rearrangement derived products (10 and 11) demonstrate that this rearrangement can occur at temperatures as low as 120-degrees-C and this is the first time product 11 has been observed.
Carbene addition to the 2,3-bond of naphthalene and thermal Wolff rearrangement of bis(methoxycarbonyl)carbene
作者:Martin Pomerantz、Moshe Levanon
DOI:10.1016/s0040-4039(00)74470-4
日期:1991.2
Reaction of naphthalene with bis(methoxycarbonyl)carben(2) produced thermally from dimethyl diazomalonate (1) gives 7,7-bis(methoxycarbonyl)-2,3-benzobicyclo[4.1.0]-hepta-2,4-diene (4), dimethyl (1-naphthyl)malonate (5), dimethyl 2,3-bis(methoxycarbonyl)fumarate (6), the azine 7, 5,5,8,8-tetrakis(methoxycarbonyl)-2,3-benzotricyclo[5.1.0.0(4,6)]oct-2-ene (8), 7,7-bis(methoxycarbonyl)-3,4-benzotropilidene (9) and the two dimers, 10 and 11. Product 9 represents the first time a carbene has been observed to add to the 2,3-bond of naphthalene. The Wolff rearrangement derived products (10 and 11) demonstrate that this rearrangement can occur at temperatures as low as 120-degrees-C and this is the first time product 11 has been observed.