135266-93-2Relevant articles and documents
Boronic acid-catalyzed final-stage site-selective acylation for the total syntheses of O-3′-acyl bisabolol β-D-fucopyranoside natural products and their analogues
Nakamura, Yuki,Ochiai, Takayuki,Makino, Kazuishi,Shimada, Naoyuki
, p. 281 - 285 (2021/03/08)
The first concise total syntheses of O-3′-senecioyl α-bisabolol β-D-fucopyranoside (4a) and O-3′isovaleroyl α-bisabolol β-D-fucopyranoside (4b) were achieved through final-stage site-selective acylation via the activation of cis-vicinal diols by imidazole
Visible Light Enables Aerobic Iodine Catalyzed Glycosylation
Krumb, Matthias,Lucas, Tobias,Opatz, Till
supporting information, p. 4517 - 4521 (2019/08/06)
A versatile protocol for light induced catalytic activation of thioglycosides using iodine as an inexpensive and readily available photocatalyst was developed. Oxygen serves as a green and cost-efficient terminal oxidant and irradiation is performed with a common household LED-bulb. The scope of this glycosylation protocol was investigated in the synthesis of O-glycosides with yields up to 95 %.
Sterically Hindered 2,4,6-Tri- tert-butylpyridinium Salts as Single Hydrogen Bond Donors for Highly Stereoselective Glycosylation Reactions of Glycals
Ghosh, Titli,Mukherji, Ananya,Kancharla, Pavan K.
supporting information, p. 3490 - 3495 (2019/05/24)
We demonstrate here that the strained and bulky protonated 2,4,6-tri-tert-butylpyridine salts serve as efficient catalysts for highly stereoselective glycosylations of various glycals. Moreover, the mechanism of action involves an interesting single hydrogen bond mediated protonation of glycals and not via the generally conceived Br?nsted acid pathway. The counteranions also play a role in the outcome of the reaction.