𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Concave Pyridines for Selective Acylations of Polyols

✍ Scribed by Ulrich Lüning; Sönke Petersen; Wolfgang Schyja; Wolfgang Hacker; Torsten Marquardt; Kerstin Wagner; Michael Bolte

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
610 KB
Volume
1998
Category
Article
ISSN
1434-193X

No coin nor oath required. For personal study only.

✦ Synopsis

Selectivity enhancements in the base-catalyzed acylation of polyols (1,2-or 1,3-alkanediol, partially protected glucoside) have been found with (bi)macrocyclic pyridines 2 and 9 as catalysts. The different selectivities obtained for concave py-

📜 SIMILAR VOLUMES

ChemInform Abstract: Concave Reagents. P
ChemInform Abstract: Concave Reagents. Part 26. Concave Pyridines for Selective Acylations of Polyols.
✍ U. LUENING; S. PETERSEN; W. SCHYJA; W. HACKER; T. MARQUARDT; K. WAGNER; M. BOLTE 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 29 KB

1998 catalysis, phase-transfer catalysis catalysis, phase-transfer catalysis O 0020 35 -039 Concave Reagents. Part 26. Concave Pyridines for Selective Acylations of Polyols. -Macrocyclic pyridines, e.g. (I) and (II), are powerful catalysts for selective acylation of very similar hydroxyl groups in

Concave Reagents, 21. Selective Acylatio
Concave Reagents, 21. Selective Acylations of Primary and Secondary Alcohols by Ketenes
✍ Schyja, Wolfgang ;Petersen, Sönke ;Lüning, Ulrich 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 653 KB

## Abstract Concave pyridines 1 were used to catalyze the addition of primary and secondary alcohols to ketenes 4, and the kinetic data of these catalyses were determined. In inter‐ and intramolecular competitions the use of 1e–g led to improved selectivities for the acylation of primary alcohols i

ChemInform Abstract: Concave Reagents. P
ChemInform Abstract: Concave Reagents. Part 21. Selective Acylations of Primary and Secondary Alcohols by Ketenes.
✍ W. SCHYJA; S. PETERSEN; U. LUENING 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 29 KB 👁 1 views

1997 esterification, ester hydrolysis esterification, ester hydrolysis O 0310 12 -070 Concave Reagents. Part 21. Selective Acylations of Primary and Secondary Alcohols by Ketenes. -Concave pyridines of the type (I) (7 examples) of varying ring size are used to catalyze the addition of primary and s