References and Notes
- Ronan , B. and Kagan , H. B. 1991 . Tetrahedron : Asymmetry , 2 : 75
- Bonfand , E. , Gosselin , P. and Maignan , C. 1993 . Tetrahedron : Asymmetry , 4 : 1667
- Takahashi , T. , Fujii , A. , Sugita , J. , Hagi , T. , Kitano , K. , Arai , Y. and Koizumi , T. 1991 . Tetrahedron : Asymmetry , 2 : 1379 – 1390 .
- Bonfand , E. , Gosselin , P. and Maignan , C. 1992 . Tetrahetron Lett. , 33 : 2347
- Aversa , M. C. , Bonaccorsi , P. , Giannetto , P. , Jafari , S. M.A. and Jones , D. N. 1992 . Tetrahetron : Asymmetry , 3 : 701
- De Lucci , O. , Marchioro , C. , Lucchini , V. and Valle , G. 1986 . J. Org. Chem. , 51 : 1457
- Adams , H. , Jones , D. N. , Aversa , M. C. , Bonaccorsi , P. and Giannetto , P. 1993 . Tetrahedron Lett. , 34 : 6481
- Hiroi , K. , Umemura , M. and Fujisawa , A. 1992 . Tetrahedron Lett. , 33 : 7161
- Arai , Y. , Kuwayama , S.-i. , Takeuchi , Y. and Koizumi , T. 1985 . Tetrahedron Lett. , 26 : 6205
- Koizumi , T. , Arai , Y. and Takayama , H. 1987 . Tetrahedron Lett. , 28 : 3689
- Similar conclusion was obtained by Jones, D.N. (see ref. 3a)
- Crystal data for 7a (C34H38O4S): monoclinic, space group P21, a=12.993(6) b=18.070(4) c=13.245(4)A, β=105.93(3)°, V=299.3(17)A3, Z=4, Dc=1.205g cm−3, 3107 independent observed reflections, 702 refined parameters, Robs=0,0358.
- Compared to the cycloaddition of 1 with anthracene which proceeded at r.t. for 51 hr. under the presence of ZnCl2 reported by Koizumi (see ref.4a).