Abstract
The introduction of N and S-nucleophiles into the 2H-4-azabenzimidazole system using the 1H-benzotriazole ring as a synthetic auxiliary, and also the syntheses of novel pentacyclic ring systems by application of the Graebe-Ullmann method, are described.
References
1.
Schwoch S.
,
Kramer W.
,
Neidlein R.
, and
Suschitzky H.
, Helv. Chim. Acta 1994 , 77 , 2175 .
2.
Suschitzky H.
,
Kramer W.
,
Neidlein R.
, and
Uhl H.
, J. Chem. Soc., Perkin Trans. 1 , 1988 , 983 .
3.
Cada A.
,
Kramer W.
,
Neidlein R.
, and
Suschitzky H.
, Helv. Chim. Acta 1990 , 73 , 902 .
4.
Iddon B.
,
Kutschy P.
,
Robinson A.G.
,
Suschitzky H.
,
Kramer W.
, and
Neugebauer F.A.
, J. Chem. Soc., Perkin Trans. 1 , 1992 , 3129 .
5.
Bussolotti D.L.
,
La Mattina J.L.
, and
James K.
, Tetrahedron Lett. , 1991 , 32 , 6503 .
6.
Davies K.E.
,
Domany G.E.
,
Farhat M.
,
Herbert J.A.L.
,
Jefferson A.M.
,
de los A.G. Martin M.
, and
Suschitzky H.
, J. Chem. Soc. Perkin Trans. 1 , 1984 , 2465 .
7.
Katritzky A.R.
,
Rachwal S.
, and
Hitchings G.J.
, Tetrahedron , 1991 , 47 , 2683 .
8.
Beyer: Lehrbuch der organischen Chemie W.
, 22 Auflage, pp. 734;
Graebe C.
, and
Ullmann F.
Justus Liebigs Ann. Chem. , 1896 , 291 , 16 .