Figure 2.
Synthesis of m42C phosphoramidite 5. Conditions: (a) MeI, NaH, THF; (b) HF.Py, THF; (c) DMTrCl, Py; (d) (i-Pr2N)2P(Cl)OCH2CH2CN, (i-Pr)2NEt, 1-methylimidazole, DCM.
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