Novel protocol for the synthesis of octahydropyrano- and thiopyrano[4,3-a]carbazole derivatives via Prins/Friedel–Crafts cyclization
摘要:
A novel Prins/Friedel-Crafts cyclization of (Z)-6-(1-methyl-1H-indol-3-yl)hex-3-en-1-ol with aldehydes has been achieved using a catalytic amount of BF3 center dot OEt2 under mild reaction conditions to produce the corresponding octahydropyrano[4,3-a]carbazole derivatives in good yields with high diastereoselectivity. The cross-coupling of (Z)-6-(1-methyl-1H-indo1-3-y1)hex-3-ene-1-thiol with aldehydes affords the corresponding octahydrothiopyrano[4,3-a]carbazole derivatives under similar conditions. (C) 2013 Elsevier Ltd. All rights reserved.
Novel protocol for the synthesis of octahydropyrano- and thiopyrano[4,3-a]carbazole derivatives via Prins/Friedel–Crafts cyclization
摘要:
A novel Prins/Friedel-Crafts cyclization of (Z)-6-(1-methyl-1H-indol-3-yl)hex-3-en-1-ol with aldehydes has been achieved using a catalytic amount of BF3 center dot OEt2 under mild reaction conditions to produce the corresponding octahydropyrano[4,3-a]carbazole derivatives in good yields with high diastereoselectivity. The cross-coupling of (Z)-6-(1-methyl-1H-indo1-3-y1)hex-3-ene-1-thiol with aldehydes affords the corresponding octahydrothiopyrano[4,3-a]carbazole derivatives under similar conditions. (C) 2013 Elsevier Ltd. All rights reserved.
A novel Prins/Friedel-Crafts cyclization of (Z)-6-(1-methyl-1H-indol-3-yl)hex-3-en-1-ol with aldehydes has been achieved using a catalytic amount of BF3 center dot OEt2 under mild reaction conditions to produce the corresponding octahydropyrano[4,3-a]carbazole derivatives in good yields with high diastereoselectivity. The cross-coupling of (Z)-6-(1-methyl-1H-indo1-3-y1)hex-3-ene-1-thiol with aldehydes affords the corresponding octahydrothiopyrano[4,3-a]carbazole derivatives under similar conditions. (C) 2013 Elsevier Ltd. All rights reserved.