共 50 条
- [25] A new synthetic approach to 5-dethia-4-methyl-5-oxacephems TETRAHEDRON, 2003, 59 (31) : 5893 - 5903
- [26] RING TRANSFORMATIONS OF PHOSPHORUS-CONTAINING HETEROCYCLES .11. A NEW APPROACH TO PHOSPHININES BY 3-STEP AROMATIZATION OF 1-ETHOXY-1,2-DIHYDROPHOSPHININE 1-OXIDES MAGYAR KEMIAI FOLYOIRAT, 1993, 99 (12): : 516 - 519