Triethylamine → tert-Butyl (E)-4-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)allyl)piperidine-1-carboxylate

HRID 1750001Notes

Reaction equation

HRID 1750001 reaction equation
[CH2:1]([CH:4]1[CH2:9][CH2:8][N:7]([C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11])[CH2:6][CH2:5]1)[C:2]#[CH:3].[CH3:17][C:18]1([CH3:25])[C:22]([CH3:24])([CH3:23])[O:21][BH:20][O:19]1.C(N(CC)CC)C>C(Cl)Cl.[H-].[Cl-].C1([Zr+2]C2C=CC=C2)C=CC=C1>[CH3:17][C:18]1([CH3:25])[C:22]([CH3:24])([CH3:23])[O:21][B:20](/[CH:3]=[CH:2]/[CH2:1][CH:4]2[CH2:9][CH2:8][N:7]([C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11])[CH2:6][CH2:5]2)[O:19]1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 27347684,4,5,5-Tetramethyl[1,3,2]dioxaborolaneHCID 18187546Tert-butyl 4-(prop-2-yn-1-yl)piperidine-1-carboxylate

Product 1

HCID 86682085tert-Butyl (E)-4-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)allyl)piperidine-1-carboxylateYield 52%

Reagents, catalysts & solvents 2

HCID 178420592HCID 178420592, compoundCatalystHCID 6344DichloromethaneSolvent

Procedure

A solution of tert-butyl 4-(prop-2-ynyl)piperidine-1-carboxylate (0.162 g, 0.725 mmol) synthesized in Example B58, Step 1 in methylene chloride (1 mL) was added with 4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.139 g, 1.09 mmol) and triethylamine (0.00734 g, 0.0725 mmol), and the mixture was stirred at room temperature. The reaction mixture was added with bis(cyclopentadienyl)zirconium(IV) chloride hydride (0.0281 g, 0.109 mmol), and the mixture was stirred at room temperature for 40 hours. The reaction mixture was concentrated, and the resulting residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain tert-butyl (E)-4-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)allyl]piperidine-1-carboxylate (0.132 g, 52%).

Workup

  1. stirringthe mixture was stirred at room temperature for 40 hours
  2. concentrationThe reaction mixture was concentrated
  3. customthe resulting residue was purified by silica gel column chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record
ord-d75d173c483e4e5d8270f870c55f53a0
Source dataset
uspto-grants-2015_10
Patent number
US09156827B2

Reaction notes

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