Researchers have developed an adaptive liquid lens based on a new electrically responsive fluid called dibutyl adipate (DBA) that changes focal length when a voltage is applied phys.org/news/2022-01-ele…
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📅︎ Jan 19 2022
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Efficient Palladium‐Catalyzed Carbonylation of 1,3‐Dienes: Selective Synthesis of Adipates and Other Aliphatic Diesters

High value‐added conversion: From gas to nylon precursor. This 100 % atom economic and industrially relevant process is strongly influenced by the system polarity.

Abstract

The dicarbonylation of 1,3‐butadiene to adipic acid derivatives offers the potential for a more cost‐efficient and environmentally benign industrial process. However, the complex reaction network of regioisomeric carbonylation and isomerization pathways, make a selective and direct transformation particularly difficult. Here, we report surprising solvent effects on this palladium‐catalysed process in the presence of 1,2‐bis‐di‐tert‐butylphosphin‐oxylene (dtbpx) ligands, which allow adipate diester formation from 1,3‐butadiene, carbon monoxide, and methanol with 97 % selectivity and 100 % atom‐economy under scalable conditions. Under optimal conditions a variety of di‐ and triesters from 1,2‐ and 1,3‐dienes can be obtained in good to excellent yields.

https://ift.tt/3uKlnrX

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📅︎ Apr 12 2021
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Calcium adipate solubility youtube.com/watch?v=ya1Qt…
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👤︎ u/CEY-19
📅︎ Jun 10 2020
🚨︎ report
Le regalan Ley Federal del Trabajo a José Merino, titular de la ADIP, quien despidió a empleado por Whats 24-horas.mx/2021/07/29/le…
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👤︎ u/frevueltas
📅︎ Aug 01 2021
🚨︎ report
Le regalan Ley Federal del Trabajo a José Merino, titular de la ADIP, quien despidió a empleado por Whats 24-horas.mx/2021/07/29/le…
👍︎ 6
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👤︎ u/frevueltas
📅︎ Aug 01 2021
🚨︎ report
Cyclopentanone distilling out to the condenser . Adipic acid was dry distilled with barium hydroxide to obtain cyclopentanone. The prep was real quick and easy . The prep video link in comments v.redd.it/igke4duxftn61
👍︎ 167
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👤︎ u/vibzzlab
📅︎ Mar 18 2021
🚨︎ report
Efficient Palladium‐Catalyzed Carbonylation of 1,3‐Dienes: Selective Synthesis of Adipates and Other Aliphatic Diesters

High value‐added conversion: From gas to nylon precursor. This 100 % atom economic and industrially relevant process is strongly influenced by the system polarity.

Abstract

The dicarbonylation of 1,3‐butadiene to adipic acid derivatives offers the potential for a more cost‐efficient and environmentally benign industrial process. However, the complex reaction network of regioisomeric carbonylation and isomerization pathways, make a selective and direct transformation particularly difficult. Here, we report surprising solvent effects on this palladium‐catalysed process in the presence of 1,2‐bis‐di‐tert‐butylphosphin‐oxylene (dtbpx) ligands, which allow adipate diester formation from 1,3‐butadiene, carbon monoxide, and methanol with 97 % selectivity and 100 % atom‐economy under scalable conditions. Under optimal conditions a variety of di‐ and triesters from 1,2‐ and 1,3‐dienes can be obtained in good to excellent yields.

https://ift.tt/38No0B7

👍︎ 2
💬︎
📅︎ Mar 03 2021
🚨︎ report

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