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2-(Chroman-6-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

CAS No.: 1002727-88-9

Category

Cat.NO.:A165636  Purity:97%

Product Details of [ 1002727-88-9 ]

CAS No. : 1002727-88-9
Formula :

C15H21BO3

M.W :

260.14

SMILES Code :
CC1(C)C(C)(C)OB(C2=CC(CCCO3)=C3C=C2)O1
MDL No. : MFCD12028565
InChI Key : NDSHAELUPJMEBM-UHFFFAOYSA-N
Pubchem ID : 43811034

Safety of [ 1002727-88-9 ]

GHS Pictogram:
Signal Word: Warning
Hazard Statements: H302-H315-H319-H332-H335
Precautionary Statements: P261-P280-P305+P351+P338

Application In Synthesis of [ 1002727-88-9 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 1002727-88-9 ]

[ 1002727-88-9 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 3875-78-3 ]
  • [ 73183-34-3 ]
  • [ 1002727-88-9 ]
Yield Reaction Conditions Operation in experiment
59% With potassium acetate;(1,1′-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; In N,N-dimethyl-formamide; at 95℃; for 3h;Inert atmosphere; Step 1. 2-(Chroman-6-yl)-4,4,5,5-tetramethyl-l ,3,2-dioxaborolaneTo a solution of <strong>[3875-78-3]6-bromochroman</strong> (400 mg, 1.88 mmol) in N,N-dimethylformamide (50 mL) was added 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(l,3,2-dioxaborolane) (620 mg, 2.44 mmol), KOAc (552.1 mg, 5.63 mmol) and Pd(dppf)Cl2 (155 mg, 0.19 mmol) with stirring for 3 h at 95C maintained with an inert atmosphere of nitrogen in an oil bath. The reaction mixture was diluted with water, extracted with ethyl acetate (80 mL x 3) and the organic layers combined, dried over anhydrous magnesium sulfate, concentrated under vacuum to give the residue, which was applied onto a silica gel column with 1 % ethyl acetate in petroleum ether to afford 2-(chroman-6-yl)-4,4,5,5-tetramethyl-l,3,2-dioxaborolane as colorless oil (320 mg, 59%).*H-NMR (300 MHz, CDC13): delta 7.54 (d, J = 7.5 Hz, 2H), 6.78 (d, J = 8.4 Hz, 1H), 4.19 – 4.23 (t, J = 5.4 Hz, 2H), 2.78 – 2.83 (t, J = 6.3 Hz, 2H), 1.98 – 2.05 (m, 2H), 1.28 (s,12H)
 

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