engleski

The Enantiomers of Chromenes and Their Barriers to Reversible Ring Opening

Separation of enantiomers of 2H-chromenes 1-4 was acchieved by semipreparative liquid cromatography on triacetyl or tribenzyl cellulose. The barriers to enantiomerization amount to deltaG#=85-105 kJ/mol for spiro-2H-chromenes 1, 2 and 3 and to deltaG#=105-123 kJ/mol for non-spiro 2H-chromenes 4.

2H-chromenes; separation of enantiomers; semipreparative liquid cromatography; barriers to reversible ring opening

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