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Volumn 54, Issue 46, 1998, Pages 14145-14156

Reaction of aromatic diamines with diphenylcarbonate catalyzed by phosphorous acids: A new clean synthetic route to mono- and dicarbamates

Author keywords

[No Author keywords available]

Indexed keywords

2,4 DIAMINOTOLUENE; AROMATIC COMPOUND; DIAMINE; PHOSPHORUS ACID DERIVATIVE;

EID: 0032512092     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4020(98)00873-4     Document Type: Article
Times cited : (37)

References (45)
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    • note
    • 17. A mixture of 1a (0.585 mmol) and DPC ( 12.2 mmol), heated at 363 K for 4 h in the absence of any catalyst, produced only traces of 3a, while 4a was obtained with a yield of 10 %.
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    • note
    • 18. When 1b (0.655 mmol) was heated in DPC (11.2 mmol) at 363 K for 10 h, in the absence of any catalyst, only traces of 3b were obtained. 4b yield was not higher than 20 % (by HPLC).
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    • note
    • 2P(O)OH (0.409 mmol) at 393 K for 72 hours.
  • 43
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    • note
    • 2P(O)OPh (0.083 mmol) heated at 363 K for 10 h afforded 3b and 4b with yield of 20 and 80 % (HPLC), respectively.
  • 44
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    • note
    • 2P(O)OPh was not found when a MeOH solution of the acid and DPC was stirred at 343 K for several hours. In this case, the GC-MS analysis of the reaction mixture revealed the formation of traces of PhOH and methylphenylcarbonate.


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