Sodium hydrogen carbonate as an alternative blowing agent in the preparation of palm-based polyurethane foam

Author(s):  
Amira Shakim Abdul Shakir ◽  
Khairiah Haji Badri ◽  
Chia Chin Hua
1999 ◽  
Vol 23 (2) ◽  
pp. 94-95
Author(s):  
Mark A. E. Bowman ◽  
Ralph E. Bowman

Reaction of the N-formyl enol-lactone 4 and the corresponding N-acetyl 10 and N-methoxycarbonyl 11 derivatives with bis(trimethylsilyl)potassiomalonate in THF at 60°C followed by treatment with aqueous sodium hydrogen carbonate and cyclisation as above, yielded the 4-formyl-, 4-acetyl- and 4-methoxycarbonyl-tricyclic ketones 7, 13 and 14 in yields of 31, 35 and 36%, respectively.


Author(s):  
T. Fawzi ◽  
L.J. Yu ◽  
K.H. Badri ◽  
Zainuddin Sajuri ◽  
Ammar Abdulaziz Majeed Al-Talib ◽  
...  

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