Benzyl carbazate → N'-(1,1,2-trimethyl-1,1a,5,5a-tetrahydro-3-thia-cyclopropa[a]pentalene-4-carbonyl)-hydrazinecarboxylic acid benzyl ester

HRID 2366115Notes

Reaction equation

HRID 2366115 reaction equation
[CH3:1][C:2]1([CH3:15])[C@@H:4]2[CH2:5][C:6]3[C:10]([C@H:3]12)=[C:9]([CH3:11])[S:8][C:7]=3[C:12]([OH:14])=O.[CH2:16]([O:23][C:24]([NH:26][NH2:27])=[O:25])[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F>C(Cl)Cl.CCOCC>[CH2:16]([O:23][C:24]([NH:26][NH:27][C:12]([C:7]1[S:8][C:9]([CH3:11])=[C:10]2[C:6]=1[CH2:5][CH:4]1[C:2]([CH3:1])([CH3:15])[CH:3]12)=[O:14])=[O:25])[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

7

Reactant 4

HCID 79242Benzyl carbazateHCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 57892448(1aS,5aR)-1,1,2-trimethyl-1,1a,5,5a-tetrahydro-3-thia-cyclopropa[a]pentalene-4-carboxylic acid

Product 1

HCID 67520612N'-(1,1,2-trimethyl-1,1a,5,5a-tetrahydro-3-thia-cyclopropa[a]pentalene-4-carbonyl)-hydrazinecarboxylic acid benzyl ester

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of (1aS,5aR)-1,1,2-trimethyl-1,1a,5,5a-tetrahydro-3-thia-cyclopropa[a]pentalene-4-carboxylic acid (2.2 g, 9.9 mmol), hydrazinecarboxylic acid benzyl ester (3.38 g, 20.4 mmol) and DIPEA (2 mL) in DCM (50 mL) is added TBTU (3.2 g, 10 mmol). The mixture is stirred at rt for 20 h. The mixture is diluted with Et2O (200 mL) and extracted with 1M aq. NaOH (3×50 mL) and 1M aq. HCl (2×50 mL). The organic phase is dried (Na2SO4), filtered and evaporated to give crude N′-(1,1,2-trimethyl-1,1a,5,5a-tetrahydro-3-thia-cyclopropa[a]pentalene-4-carbonyl)-hydrazinecarboxylic acid benzyl ester; LC-MS: tR=1.01 min, [M+1]+=371.25.

Workup

  1. extractionextracted with 1M aq. NaOH (3×50 mL) and 1M aq. HCl (2×50 mL)
  2. dry with materialThe organic phase is dried (Na2SO4)
  3. filtrationfiltered
  4. customevaporated

Sources & evidence

ORD record
ord-f7f3f9bd0949405f8d5719781c8bed9d
Source dataset
uspto-grants-2014_04
Patent number
US08697732B2

Reaction notes

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