Scheme 2.
Gram-scale reaction and deprotection. Conditions: a) MeONa (2.2 equiv), MeOH, rt, 24 h; b) Morpholine (2.0 equiv), n-BuLi (2.4 equiv), THF, rt, 5 h; c) PhONa (2.0 equiv), DMF, rt, 24 h.
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