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An overview of the skeletal transformations applied by Schreiber in the preparation of >4000 skeletally diverse small molecules. Reagents and conditions: (1) amine, LiClO4 (or thiol); (2) alkylation, acylation or oxazolidone formation [for X = NR2]; (3) R3COC≡CH, Et2AlCl; (4) heat.
