Allyl bromide → HCID 13332059, compound

To stirred solution of 2-methylbut-3-yn-2-ol (7.33 ml, 75 mmol) in DMF (100 mL) was added 60% NaH (3.00 g, 75 mmol) at 0° C. After 30 min, the cold bath was removed stirred for 1 h at rt. To this was added allyl bromide (9.74 ml, 113 mmol) over 5 min and continued stirring for 16 h. Then, diluted with Et2O (250 mL), washed with water (5×50 mL), brine (50 mL), dried (MgSO4), filtered and concentrated to give yellow liquid (5.64 g). HNMR of this indicated it is 2:1 mixture of product and unreacted alcohol. This was used without purification. 1H NMR (500 MHz, CDCl3) δ 5.93-6.02 (m, 1H), 5.32 (qd, J=1.7, 17.2 Hz, 1H), 5.18 (qd, J=1.5, 10.4 Hz, 1H), 4.13 (td, J=1.4, 5.6 Hz, 2H), 2.45 (s, 1H), 1.52 (s, 6H).

1. customthe cold bath was removed
2. stirringcontinued stirring for 16 h
3. washwashed with water (5×50 mL), brine (50 mL)
4. dry with materialdried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated

ORD record

ord-1256dfe9697d4778a08d6ece6b149e43

Source dataset

uspto-grants-2016_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09273067B2