Triethylamine → N-BOC-1,6-diaminohexane

In this synthesis CDTAMA is reacted with the monoprotected diamine N-(t-butyoxycarbonyl)-1,6-diaminohexane to give the corresponding amide. The t-Boc protecting group is then hydrolyzed to give the product. To prepare the monoprotected diamine N-(t-butyoxycarbonyl)-1,6-diaminohexane, first 9.4 g (81.2 mmol) of 1,6-diaminohexane is dissolved in 60 ml dry chloroform and 0.85 ml (6.1 mmol) triethylamine is added. To this solution is added dropwise 1 g (4.1 mmol) [2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile (BOC-ON) dissolved in 20 ml dry chloroform. This solution is stirred 7 hr, filtered and the filtrate evaporated to an oil. This oil is vacuum distilled to remove the excess 1,6-diaminohexane. The residue in the distillation flask is dissolved in acetone and purified on a silica gel chromatography column (eluted with acetone) to give 0.68 g (77%) of N-(t-butoxycarbonyl)-1,6-diaminohexane as a yellow oil.

1. customhydrolyzed to give the product
2. filtrationfiltered
3. customthe filtrate evaporated to an oil
4. distillationdistilled
5. customto remove the excess 1,6-diaminohexane
6. dissolutionThe residue in the distillation flask is dissolved in acetone
7. custompurified on a silica gel chromatography column (eluted with acetone)

ORD record

ord-446795b58b3c4000bb7f0552ede0c5de

Source dataset

uspto-grants-1991_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05021571