摘要:
The object of the present invention is to provide a novel general-purpose method of precisely and easily determining the absolute configuration of chiral compounds having a wide variety of basic groups. The present invention provides a method for determining the absolute configuration of a chiral compound which comprises:
coordinating the chiral compound to a metalloporphyrin, the metalloporphyrin having a carbon chain-crosslinked porphyrin dimer structure in which one of the two porphyrin rings has at least one ethyl or substituent bulkier than ethyl at at least one of the second peripheral carbon atoms from the carbon atom at the carbon chain crosslink site, the chiral compound having an asymmetric carbon bonded to a basic group capable of coordinating to the metal of the other porphyrin ring of the metalloporphyrin dimer or an asymmetric carbon atom adjacent to the carbon atom bonded to the basic group; and analyzing the resultant coordination compound by circular dichroism spectrophotometry to determine the absolute configuration of the asymmetric carbon of the chiral compound based on the sign of the Cotton effect.
摘要:
A novel general-purpose method of precisely and easily determining the absolute configuration of a chiral compound which can have various kinds of basic groups bonded. The method uses a metal porphyrin having a structure which comprises a porphyrin dimer crosslinked with a carbon chain and in which one of the two porphyrin rings has a substituent bulkier than an ethyl group and bonded to at least one of the second peripheral carbon atoms from the carbon atom at the crosslink with the carbon chain. In this method, either a chiral compound having an asymmetric carbon atom having, bonded thereto, a basic group capable of coordinating to the metal of the other porphyrin ring of the dimer structure of the metal porphyrin or a chiral compound having an asymmetric carbon atom adjacent to a carbon atom having the basic group bonded thereto is coordinated to the metal porphyrin. The resultant coordination compound is analyzed by spectrophotometry based on circular dichroism to determine the absolute configuration of the chiral compound based on the symbol of a Cotton effect.