Bromide ion → 2,2'-Thiodipyridine

1.11 g of 2-mercaptopyridine and 0.48 g of 50% sodium hydride were dissolved in 25 ml of dimethyl formamide, and the mixture was stirred at room temperature for 1 hour. A solution of 6.5 g of polyprenyl bromide of general formula (II) in which n is 15 and A2 is Br in 5 ml of N,N-dimethylformimide was added dropwise. After the addition, the mixture was stirred overnight at room temperature. The reaction mixture was poured into about 50 ml of water, and extracted with diethyl ether. Then, the diethyl ether layer was washed with water and dried over anhydrous magnesium sulfate. The ether was distilled off to give a yellow liquid. The liquid was purified by silica gel column chromatography using hexane/ethyl acetate as an eluent to give 3.9 g of a slightly yellow liquid. The NMR analysis of this liquid showed that the signal (doublet, δ=3.91) assigned to --CH2Br of the starting polyprenyl bromide disappeared, and a signal (doublet, δ=3.78) assigned to --CH2S and a signal (multiplet, δ=6.75-8.35) assigned to --S--C5H4N newly appeared. The FD-MASS analysis of this liquid gave m/e=1335.

1. additionwas added dropwise
2. additionAfter the addition
3. stirringthe mixture was stirred overnight at room temperature
4. extractionextracted with diethyl ether
5. washThen, the diethyl ether layer was washed with water
6. dry with materialdried over anhydrous magnesium sulfate
7. distillationThe ether was distilled off
8. customto give a yellow liquid
9. customThe liquid was purified by silica gel column chromatography
10. customto give 3.9 g of a slightly yellow liquid
11. customThe FD-MASS analysis of this liquid gave m/e=1335

ORD-Eintrag

ord-efa8d0713da74ed5ab652ed926227c6b

Quelldatensatz

uspto-grants-1991_12

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05077046