4-Nitrophenyl chloroformate → HCID 86712391, compound

Participants

Reaction Steps

Compound 10 (2.64 g, 15.7 mmol) and TEA (2.63 ml, 18.8 mmol 1.2 eq) dissolved in THF (0.2 M, 79 ml) were added dropwise to a stirred solution of 4-nitrophenyl chloroformate (9.49 g, 47.1 mmol, 3.0 eq) and THF (0.7 M, 22 ml) over a period of 1 h at −10° C. The reaction mixture was stirred overnight at RT and diluted with cHex (100 ml). Then cHex (100 ml) was added and the THF was removed under reduced pressure. Filtration of the reaction mixture followed by FC (cHex:EtOAc 4:1) gave compound 11 as a yellow oil (3.42 g, 10.3 mmol, 65%).

Provenance & Evidence