Abstract
Lithiation of N6-(α-haloacyl)-3-isopropylsydnone imines at 4-position followed by treatment with sulfur affords the 4-lithiosulfanyl derivatives whose intramolecular cyclization leads to [4,5]-bicyclic sydnone imines.
References
1.
Newton C.G., Ramsden C.A.
Tetrahedron,
1982
2.
Yashunskii V.G., Kholodov L.E.
Russian Chemical Reviews,
1980
3.
4.
Daeniker H.U., Druey J.
Helvetica Chimica Acta,
1962
5.
Ruxer J.M., Mauger J., Bénard D., Lachoux C.
Journal of Heterocyclic Chemistry,
1995
6.
J. M. Ruxer, J. Mauer, C. Lachoux, V. Richard, A. Bredeaux, P. Martorana and H. Bohn, French Patent, FR 2693726, A1 19940121, 1994.
7.
Cherepanov I.A., Lebedev S.N., Samarskaya A.S., Godovikov I.A., Nelyubina Y.V., Kalinin V.N.
Mendeleev Communications,
2009
8.
Nelyubina Y.V., Antipin M.Y., Cherepanov I.A., Lyssenko K.A.
CrystEngComm,
2010
9.
Sheldrick G.M.
Acta Crystallographica Section A Foundations of Crystallography,
2007