Circular dichroism of diastereomeric 3,3′-di-t-butyl-1,1′-spirobi-indans

Abstract

Two diastereomeric 3,3′-di-t-butyl-1,1′-spirobi-indans, (1R,3S,3′S)-(1a) and (1S,3S,3′S)-(1b), have been prepared; their c.d. spectra are similar to each other in spite of the opposite configuration at the spiro centre.