HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 350809Generated: October 30, 2026
Ethyl chloroformate → tert-butyl 6-[(ethoxycarbonyl)amino]-1,3,4,5-tetrahydro-2H-pyrido[4,3-b]indole-2-carboxylate
https://huagongshe.com/reaction/350809
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Ethyl chloroformate | HCID 10928 | — |
| Reactant | Potassium Carbonate | HCID 11430 | — |
| Reactant | tert-Butyl 6-amino-3,4-dihydro-1H-pyrido[4,3-b]indole-2(5H)-carboxylate | HCID 22036788 | — |
| Solvent | Water | HCID 962 | — |
| Solvent | Dichloromethane | HCID 6344 | — |
| Product | tert-butyl 6-[(ethoxycarbonyl)amino]-1,3,4,5-tetrahydro-2H-pyrido[4,3-b]indole-2-carboxylate | HCID 22036756 | 605.1% |
Reaction Steps
To a solution of tert-butyl 6-amino-1,3,4,5-tetrahydro-2H-pyrido[4,3-b]indole-2-carboxylate (7 g, 24.3 mmol) in CH2Cl2 (40 mL) at rt was added saturated K2CO3 (30 mL), ethyl chloroformate (2.4 mL, 4.0 mmol) and stirred at 25° C. for 0.5 hour. The solution was diluted with water (30 mL) and extracted with CH2Cl2 (2×30 mL). The combined extracts were dried over magnesium sulfate, and concentrated to afford tert-butyl 6-[(ethoxycarbonyl)amino]-1,3,4,5-tetrahydro-2H-pyrido[4,3-b]indole-2-carboxylate (8.7 g, 100%) as an crude oil. MS [M+H]+ 360.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US07183282B2 |
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| Source dataset | uspto-grants-2007_02 |
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| ORD ID | ord-904fa3e83743458688f01869c6d956b6 |
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| Source note | uspto-grants-2007_02 |
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