Trimethylsilyketene dialkylacetals in organic synthesis: Reactions with alkyldiazoacetates
摘要:
The reaction of trimethylsilylketene dialkylacetals with alkyldiazoacetates in the presence of Cu(acac)(2) or Rh-2(OAc)(4) results in the formation of alkyl-2,2-dialkoxy-3-trimethylsilylcyclopropane-1-carboxylates 3-8. The cycloaddition proceeds stereoselectively, giving exclusively one of two possible diastereomers. Compounds 4 and 6 are transformed by reaction with LiAIH(4), to cyclopropylmethanols 9 and 10 in high yields. All compounds have been characterized by elemental analyses, H-1, C-13 NMR and IR spectroscopy.
LIVANTSOVA, L. I.;NOVIKOVA, O. P.;ZAJTSEVA, G. S.;BAUKOV, YU. I., ZH. OBSHCH. XIMII, 59,(1989) N0, S. 2293-2299
作者:LIVANTSOVA, L. I.、NOVIKOVA, O. P.、ZAJTSEVA, G. S.、BAUKOV, YU. I.
DOI:——
日期:——
Livantsova, L. I.; Novikova, O. P.; Zaitseva, G. S., Journal of general chemistry of the USSR, 1989, vol. 59, # 10.2, p. 2055 - 2060
作者:Livantsova, L. I.、Novikova, O. P.、Zaitseva, G. S.、Baukov, Yu. I.
DOI:——
日期:——
Trimethylsilyketene dialkylacetals in organic synthesis: Reactions with alkyldiazoacetates
作者:Galina S. Zaitseva、Ol'ga P. Novikova、Evgeny V. Grigoriev、Alexander V. Kisin、Evgeni V. Avtomonov、Jörg Lorberth
DOI:10.1016/s0022-328x(96)06504-7
日期:1996.11
The reaction of trimethylsilylketene dialkylacetals with alkyldiazoacetates in the presence of Cu(acac)(2) or Rh-2(OAc)(4) results in the formation of alkyl-2,2-dialkoxy-3-trimethylsilylcyclopropane-1-carboxylates 3-8. The cycloaddition proceeds stereoselectively, giving exclusively one of two possible diastereomers. Compounds 4 and 6 are transformed by reaction with LiAIH(4), to cyclopropylmethanols 9 and 10 in high yields. All compounds have been characterized by elemental analyses, H-1, C-13 NMR and IR spectroscopy.