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Synthesis of santacruzamate A inverted ethyl carbamate analogue. Reagents and Conditions: (i) TEA, MeOH, reflux, 92%; (ii) methyl-4-hydroxybutanoate, N,N′-disuccinimdyl carbonate, TEA 79%; (iii) NHS-methyl-4-hydroxybutanoate, 68% ethylamine, TEA, THF; (iv) phenethylamine, EDC-HCl, TEA, DMAP, CH2Cl2 56%.
