Triphenylphosphine → 8-Azidomethyl-5-(4-nitrophenyl)-9H-1,3-dioxolo[4,5-h][2,3]-benzodiazepine

HRID 430657

Reaction equation

HRID 430657 reaction equation
O[CH2:2][C:3]1[CH2:9][C:8]2[CH:10]=[C:11]3[O:16][CH2:15][O:14][C:12]3=[CH:13][C:7]=2[C:6]([C:17]2[CH:22]=[CH:21][C:20]([N+:23]([O-:25])=[O:24])=[CH:19][CH:18]=2)=[N:5][N:4]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[NH:45]=[N+:46]=[N-:47].C(OC(N=NC(OCC)=O)=O)C>O1CCCC1.C1(C)C=CC=CC=1>[N:45]([CH2:2][C:3]1[CH2:9][C:8]2[CH:10]=[C:11]3[O:16][CH2:15][O:14][C:12]3=[CH:13][C:7]=2[C:6]([C:17]2[CH:22]=[CH:21][C:20]([N+:23]([O-:25])=[O:24])=[CH:19][CH:18]=2)=[N:5][N:4]=1)=[N+:46]=[N-:47]

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 24530Hydrazoic acidHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 181831918-Hydroxymethyl-5-(4-nitrophenyl)-9H-1,3-dioxolo[4,5-h][2,3]benzodiazepine2×

Product 1

HCID 181831298-Azidomethyl-5-(4-nitrophenyl)-9H-1,3-dioxolo[4,5-h][2,3]-benzodiazepineYield 68%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of 3.06 g (9.0 mmol) of 8-hydroxymethyl-5-(4-nitrophenyl)-9H-1,3-dioxolo[4,5-h][2,3]-benzodiazepine (starting compound III.) and 2.58 g (9.9 mmol) of triphenylphosphine in 100 ml of dry tetrahydrofuran is mixed with 13.5 ml of a 1.2N hydrazoic acid solution in toluene, then a solution of 1.74 ml (9.9 mmol) of azodicarboxylic acid-diethyl ester is added, and the mixture is stirred for another 2 hours. The precipitated product is suctioned off and washed with tetrahydrofuran and n-hexane. 2.23 g (68%) of the title compound with a melting point of 198-200° C. is obtained.

Workup

  1. washwashed with tetrahydrofuran and n-hexane

Sources & evidence

ORD record
ord-5a7bcb3948914d8b87e3c6b7bab9dfd1
Source dataset
uspto-grants-2001_11
Patent number
US06323197B1

Linked notes

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