2-Bromobenzo(b)thiophene → rac-[2-(Benzo[b]thiophen-2-yl)ethynyl]-3,4-dihydro-2,5,7,8-tetramethyl-2H-1-benzopyran-6-ol

Beteiligte Stoffe

Rolle	Name	HCID	Einwaage
Edukt	2-Bromobenzo(b)thiophene	HCID 94786	—
Edukt	rac-3,4-dihydro-2-ethynyl-2,5,7,8-tetramethyl-2H-1-benzopyran-6ol	HCID 14478563	—
Produkt	rac-[2-(Benzo[b]thiophen-2-yl)ethynyl]-3,4-dihydro-2,5,7,8-tetramethyl-2H-1-benzopyran-6-ol	HCID 15171820	—

Reaktionsschritte

Reaction of rac-3,4-dihydro-2-ethynyl-2,5,7,8-tetramethyl-2H-1-benzopyran-6-ol with 2-bromobenzo[b]thiophene under the conditions described in example 16 gave after chromatographic isolation and crystallization from ether/hexane colorless crystals with m.p. 120°-123° C.

Herkunft & Nachweise

DOI	10.6084/m9.figshare.5104873.v1
Patentnummer	US05260294
Quelldatensatz	uspto-grants-1993_11
ORD ID	ord-a617309efa024efc821d88d8188e17b2
Quellennotiz	uspto-grants-1993_11