Если можно, пожалуйста, помогите и с этими:
1. Francis M. Dean and Robert S. Johnson. Reactions between 3-nitrochromone and diazoalkanes; Michael additions catalysed by diazoalkanes as nitrogen bases // J. Chem. Soc., Perkin Trans. 1, 1980, 2049
2. Francis M. Dean and B. Kevin Park. Steric effects in the ring-expansion of coumarins by 2-diazopropane and t-butyldiazomethane // J. Chem. Soc., Perkin Trans. 1, 1980, 2937
3. Francis M. Dean and Robert S. Johnson. The alkylation and ring-expansion of chromones by diazoalkanes; reluctance of oxygen to engage in sigmatropic shifts // J. Chem. Soc., Perkin Trans. 1, 1981, 224
4. Kambhampati V. B. Rao, Victor E. Marquez, James A. Kelley and Mary T. Corcoran. A new synthesis of 3-(-D-ribofuranosyl)uracil (isouridine)via the intermediacy of an O6,5-cyclotetrahydropyrimidinone nucleoside // J. Chem. Soc., Perkin Trans. 1, 1983, 127
Спасибо!!!
