[O:1]1[CH2:5][CH2:4][CH2:3][C@@H:2]1[C:6]([OH:8])=O.CCN=C=NCCCN(C)C.C1C=CC2N(O)[N:27]=[N:26]C=2C=1.NN>ClCCl>[O:1]1[CH2:5][CH2:4][CH2:3][C@@H:2]1[C:6]([NH:26][NH2:27])=[O:8]
A mixture of (R)-tetrahydrofuran-2-carboxylic acid (5.00 g, 43.1 mmol, 1.00 equiv), EDCI (12.4 g, 64.6 mmol, 1.50 equiv) and HOBt (8.70 g, 64.4 mmol, 1.50 equiv) in dichloromethane (100 mL) was stirred for 30 min at 25° C. To the mixture was then added hydrazine (2.00 g, 62.4 mmol, 1.50 equiv) dropwise. The resulting mixture was stirred overnight at 25° C. The solids were removed by filtration, and the filtrate was concentrated in vacuo to furnish 25.0 g (crude) of (R)-tetrahydrofuran-2-carbohydrazide as a yellow oil.
Wird geladen…
