| abstract |
Provided is a morpholino nucleic acid derivative which is useful in the production of a morpholino nucleic acid oligomer. A compound represented by general formula (1) or a salt thereof.nIn general formula (1): R 1 represents hydrogen, trityl, etc.; R 2 represents amide or imine; and R 3 represents a hydroxyl group which is optionally protected by trialkylsilyl or the like, or a group represented by general formula (5)[wherein: X represents O or S; Y represents dialkylamino or alkoxy; and Z represents chlorine]. |