1-(Chloromethyl)-4-(methylthio)benzene → 2-Methyl-3-(4-methylthiobenzyl)-1-indanone

To a cooled solution (-70° C.) of LDA (1M) in THF (37 mL) was added dropwise a solution of 2-methyl-1-indanone (J.A.C.S. Vol. 98, 8119-8124 (1976)) (2.5 g, 17 mmol) in THF (20 mL). The resulting dark red solution was stirred at room temperature for 3 hours, then cooled to -20° C. and a solution of 4-methylthiobenzyl chloride (3.1 g, 18 mmol) in THF (15 mL) was added slowly. The addition completed, the reaction mixture was stirred at -20° C. for 30 minutes before being quenched with 3N aqueous HCl (50 mL) and brine (50 mL). The product was extracted with ether, dried over MgSO4 and evaporated to dryness. The oily residue was chromatographed on silica gel eluting with a 1:5 mixture of ethyl acetate-hexane to afford the pure title compound as an oil.

1. temperaturecooled to -20° C.
2. additionThe addition
3. stirringthe reaction mixture was stirred at -20° C. for 30 minutes
4. custombefore being quenched with 3N aqueous HCl (50 mL) and brine (50 mL)
5. extractionThe product was extracted with ether
6. dry with materialdried over MgSO4
7. customevaporated to dryness
8. customThe oily residue was chromatographed on silica gel eluting with a 1:5 mixture of ethyl acetate-hexane

ORD-Eintrag

ord-8321a23e91b6492597d8c910d49f668f

Quelldatensatz

uspto-grants-1992_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05093356