𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Stereoelectronic effects in the DIBAL reduction of aryl-1,2-ethanediol benzylidene acetals

✍ Scribed by Donald R Gauthier Jr.; Ronald H Szumigala Jr.; Joseph D Armstrong III; R.P Volante


Book ID
104231518
Publisher
Elsevier Science
Year
2001
Tongue
French
Weight
79 KB
Volume
42
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis


Reduction of benzylidene acetal 8 with DIBAL-H selectively gave 4 in 89% yield. 1-Aryl-1,2-diol benzylidene acetals display unusual regioselectivity with electron withdrawing groups on the aryl group.


πŸ“œ SIMILAR VOLUMES


Regioselectivity in the reductive ring-o
✍ Katsuhiko Suzuki; Hisato Nonaka; Masanori Yamaura πŸ“‚ Article πŸ“… 2003 πŸ› Elsevier Science 🌐 French βš– 89 KB

Regioselectivity in the ring-opening reaction of 1,2-O-benzylidene sugars was studied. In the reductive ring-opening reaction of 1,2-O-benzylidene derivatives, only a C O1 bond was cleaved in the case of manno-type, but both the C O1 and C O2 bonds were cleaved in the case of gluco-type.

BoraneBu2BOTf: A mild reagent for the re
✍ Lu Jiang; Tak-Hang Chan πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 French βš– 216 KB

BH./Bu20T f is an effective reagent to reductively cleave 4,6-O-benzylidene acetals of various hexopyranosides to the corresponding 4-O-benzyl ethers. 4,6-O-Isopropylidene acetals can be similarly cleaved. Common protecting groups are stable to the reaction conditions.