𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Inter- and Intramolecular Hetero Diels-Alder Reactions, XXV. The Tandem Knoevenagel Hetero Diels-Alder Reaction with a Formylacetic Acid Equivalent. Synthesis of Dihydropyrancarboxylates

✍ Scribed by Tietze, Lutz F. ;Meier, Heinrich ;Nutt, Heinrich

Publisher
Wiley (John Wiley & Sons)
Year
1989
Tongue
English
Weight
834 KB
Volume
122
Category
Article
ISSN
0009-2940

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Inter- and intramolecular hetero Diels-A
Inter- and intramolecular hetero Diels-Alder reactions, 28. Synthesis of (±)-secologanin agluconeO-ethyl ether and derivatives by tandem Knoevenagel hetero Diels-Alder reaction
✍ Tietze, Lutz F. ;Meier, Heinrich ;Nutt, Heinrich 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 875 KB

## Abstract The tandem Knoevenagel hetero Diels‐Alder reaction of 4,4,4‐trichloro‐3‐oxobutanal (4), the malondialdehyde derivative 11a, and the enol ether 13 was followed by separation of the diastereomers and treatment with DBU in methanol. Thermolysis in xylene then gave the secologanin derivativ

Inter- and intramolecular hetero-Diels-A
Inter- and intramolecular hetero-Diels-Alder reactions, 32. Iridoids, 26. Synthesis of bridged homoiridoids from secologanin by tandem-Knoevenagel-hetero-Diels-Alder reactions
✍ Tietze, Lutz F. ;Bärtels, Christoph 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 634 KB

## Abstract The tandem‐Knoevenagel‐hetero‐Diels‐Alder reaction of the chiral enantiomerically pure monoterpene glucoside secologanin (1) with 1,3‐dicarbonyl compounds 6a–d and the analogous compounds 11a–b in the presence of ethylenediammonium diacetate as catalyst leads to the bridged cycloadducts

Inter- and intramolecular hetero diels-a
Inter- and intramolecular hetero diels-alder reactions, 40. Effect of high pressure on the stereoselectivity of intermolecular hetero diels-alder reactions
✍ Tietze, Lutz F. ;Hübsch, Thomas ;Oelze, Jens ;Ott, Christian ;Tost, Winfried ;Wö 📂 Article 📅 1992 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 891 KB

Hetero Diels-Alder reactions / Enamino ketones 1 High-pressure reactions / Pyrans The hetero Diels-Alder reaction of enamino ketone 1 with the vinyl ethers 7-11 leading to the dihydropyrans 12a-e and 13ae is studied in dichloromethane under high pressures up to 7 kbar. The kinetics is measured by o

Inter- and intramolecular hetero Diels-A
Inter- and intramolecular hetero Diels-Alder reactions, 51. Intermolecular hetero Diels-Alder reactions of enamino ketones. Effect of high pressure on the kinetics and diastereoselectivity
✍ Tietze, Lutz F. ;Hübsch, Thomas ;Ott, Christian ;Kuchta, Gabriele ;Buback, Micha 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English

## Abstract The hetero Diels‐Alder reaction of the enamino ketones 1b and 1c with ethyl vinyl ether (2) in dichloromethane to give the dihydropyrans 3b/4b and 3c/4c is studied at high pressure up to 5 kbar. The kinetics is measured by on‐line FT‐IR spectroscopy up to 3 kbar. The cycloadditions show