Number | Name | Date | Kind |
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4560700 | Sfchnettler et al. | Dec 1985 |
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J.Organ.Chem. 1982, 47, 786-791, XP000196816 A.Padwa et al.: "On the Problem of Regioselectivity in the 1,3-Dipolar Cycloaddition Reaction of Munchnones and Sydnones with Acetylenic Dipolarophiles" *p. 787, right-hand column, reaction scheme leading to compounds 15 and 16*. |
Heterocycles, vol.27, No. 12, 1988, pp. 2825-2832, XP000196829 P.D. Croce et al.: "Regioselectivity in the 1,3-dipolar cycloaddition reaction of 3-methyloxazolium 5-olates with acetylenic dipolarophiles" *p. 2826, scheme 1*. |