TFA-catalyzed trimerization of R -(+)-6-methyl-tetrahydro-pyran-2-one
摘要:
The enantiomerically pure (greater than or equal to98% ec) title compound R-(+)-6-methyl-tetrahydro-pyran-2-one (R)-1 in the presence of traces of trifluoroacetic acid (TFA) converts into an equilibrium Mixture with its trimer 4 [(R)-1:4=20:80] corresponding to a DeltaGcongruent to-0.8 kcal mol(-1). The transformation can be followed by H-1 and C-13 NMR spectroscopy. The structure of 4 was established by chemical correlation with (R)-1 and its molecular weight determined via its colligative properties. (C) 2002 Elsevier Science Ltd. All rights reserved.
TFA-catalyzed trimerization of R -(+)-6-methyl-tetrahydro-pyran-2-one
摘要:
The enantiomerically pure (greater than or equal to98% ec) title compound R-(+)-6-methyl-tetrahydro-pyran-2-one (R)-1 in the presence of traces of trifluoroacetic acid (TFA) converts into an equilibrium Mixture with its trimer 4 [(R)-1:4=20:80] corresponding to a DeltaGcongruent to-0.8 kcal mol(-1). The transformation can be followed by H-1 and C-13 NMR spectroscopy. The structure of 4 was established by chemical correlation with (R)-1 and its molecular weight determined via its colligative properties. (C) 2002 Elsevier Science Ltd. All rights reserved.
TFA-catalyzed trimerization of R -(+)-6-methyl-tetrahydro-pyran-2-one
作者:Fabio Fazio、Manfred P. Schneider
DOI:10.1016/s0040-4039(01)02281-x
日期:2002.1
The enantiomerically pure (greater than or equal to98% ec) title compound R-(+)-6-methyl-tetrahydro-pyran-2-one (R)-1 in the presence of traces of trifluoroacetic acid (TFA) converts into an equilibrium Mixture with its trimer 4 [(R)-1:4=20:80] corresponding to a DeltaGcongruent to-0.8 kcal mol(-1). The transformation can be followed by H-1 and C-13 NMR spectroscopy. The structure of 4 was established by chemical correlation with (R)-1 and its molecular weight determined via its colligative properties. (C) 2002 Elsevier Science Ltd. All rights reserved.