Give a curved-arrow mechanism for each of the reactions given in Fig. P20.51. OC,H, dil. HCI (catal
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OC,H, dil. HCI (catal н,с-с OC2Hs an orthoester 0 CIH O C CH dil HOI (catalyst) CH OH (e) H,C н,с-с-со,н carbon monoxide CH Ph Ph Ph CH fe) HCI CH CH (63% yield) (15% yield) Figure P20.51
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