Diethyl acetylenedicarboxylate → HCID 178472244, compound

Participants

Reaction Steps

Reaction of 4-((2-chloroethoxy)methyl)-N-hydroxytetrahydro-2H-pyran-4-carboximidamide (10.50 g, 44.36 mmol) with diethyl acetylenedicarboxylate gave 15.25 g (84% yield) of title material as light yellow oil after chromatography. 1HNMR 400 MHz (CDCl3) δ (ppm): (mixture of E/Z isomers ratio˜3:2) 1.25-1.4 (6H, quartet of triplets), 1.6 (2H, m), 2.05 (2H, m), 3.52 (1H, s), 3.54 (1H, s), 3.65-3.85 (8H, m), 4.16-4.23 (2H, m), 4.28-4.41 (2H, m), 5.33 (1H, broad s), 5.59 (1H, broad s), 5.64 (1H, s), 5.78 (1H, s). MS (ESI+) m/e 407 [M+H+].

Provenance & Evidence