Synthesis of carbon-13 labeled oxalates exhibiting extended nuclear singlet state lifetimes

摘要

Unsymmetrical perdeuterated doubly C-13 labelled oxalates exhibit extended lifetimes in the nuclear singlet state. Synthesis of 1,2 C-13(2) oxalates from commercially available precursors is described, facilitating preparation of unsymmetrical oxalates in a controlled manner.