Alkoxy(alkylthio)-4-hydroxy-2H-pyran-2-ones readily react with electrophiles to give substitution products at C-3. Hard electrophilic reagents replace hydrogen both in position 3 and in position 5 of the pyran ring. Methylation of 6-alkoxy(alkylthio)-4-hydroxy-2H-pyran-2-ones with diazomethane leads to formation of O- and N-methyl derivatives.
Zakhs, V. E.; Yakovlev, I. P.; Tretyakov, A. A., Journal of Organic Chemistry USSR (English Translation), 1991, vol. 27, # 4, p. 744 - 751
作者:Zakhs, V. E.、Yakovlev, I. P.、Tretyakov, A. A.、Gindin, V. A.、Prepyalov, A. V.、Ivin, B. A.
DOI:——
日期:——
——
作者:D. V. Novikov,、I. P. Yakovlev,、A. V. Prep'yalov,、V. E. Zakhs
DOI:10.1023/a:1012321705239
日期:——
Alkoxy(alkylthio)-4-hydroxy-2H-pyran-2-ones readily react with electrophiles to give substitution products at C-3. Hard electrophilic reagents replace hydrogen both in position 3 and in position 5 of the pyran ring. Methylation of 6-alkoxy(alkylthio)-4-hydroxy-2H-pyran-2-ones with diazomethane leads to formation of O- and N-methyl derivatives.
ZAXS, V. EH.;YAKOVLEV, I. P.;TRETYAKOV, A. A.;GINDIN, V. A.;PREPYALOV, A.+, ZH. ORGAN. XIMII, 27,(1991) N, S. 864-872
作者:ZAXS, V. EH.、YAKOVLEV, I. P.、TRETYAKOV, A. A.、GINDIN, V. A.、PREPYALOV, A.+