INTERMEDIATE FOR 2-ALKYNYLADENOSINE SYNTHESIS, PRODUCTION OF SAID INTERMEDIATE, PRODUCTION OF 2-ALKYNYLADENOSINE FROM SAID INTERMEDIATE, AND STABLE 2-ALKYNYLADENOSINE DERIVATIVE

摘要

A new compound of formula (I), wherein A represents a living group, which is useful as an intermediate for the syntheses of 2-alkynyladenosine; production of said compound; production of 2-alkynyladenosine in the (IV), wherein A = NH₂ from said compound; 2-alkynyladenosine derivative of formula (V), wherein A = NHR₄; and preservation of 2-alkynyladenosine in the form of said derivative. In the above formula, R¹ to R⁴ represent each hydrogen or a protective group, and n is an integer of 1 to 15, provided that the case where all of R¹ to R⁴ are hydrogen atoms is excluded.