2-Ethoxy-1-(ethoxycarbonyl)-1,2-dihydroquinoline → 1-(2-iodoacetamido)-N-((S)-1-((S)-1-((E)-3-((S)-7-methoxy-8-(3-((S)-7-methoxy-5-oxo-2-((E)-prop-1-enyl)-5,11a-dihydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepin-8-yloxy)propoxy)-5-oxo-5,11a-dihydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepin-2-yl)allylamino)-1-oxopropan-2-ylamino)-3-methyl-1-oxobutan-2-yl)-3,6,9,12-tetraoxapentadecan-15-amide

Participants

Reaction Steps

2-Ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (0.007 g, 0.0290 mmol, 1.0 eq) was added to a solution of amine 20c (assumed 100%, 0.023 g, 0.0290 mmol, 1.0 eq) and 1-iodo-2-oxo-6,9,12,15-tetraoxa-3-azaoctadecan-18-oic acid (I5)(0.0126 g, 0.0290 mmol, 1.0 eq) in dry dichloromethane (2 mL). The reaction mixture was stirred for 18 hours, then diluted with DCM (6 mL) and washed with water (2×10 mL). The organic layer was dried over MgSO4, filtered and concentrated under reduced pressure. The resulting residue was subjected to flash chromatography (silica gel; 40:1 v/v DCM/MeOH to 5:1 v/v DCM/MeOH) to afford the product as a pale yellow oil (0.0043 g, 29%). LC/MS (2.380 min (ES+)), m/z: 605.0 ½[M+2H]+.

Provenance & Evidence