3base
(Hive Bee) 09-16-02 19:57 No 357000 |
green route to the synthesis of piperonyl acetone | Bookmark | ||||||
chongqing daxue xuebao, ziran kexueban 2001 24(3): 146-149 (chinese) (Chongqing Daxue Xuebao Bianjibu, CODEN CDXZF2, ISSN 1000-582X) "green route to the synthesis of piperonyl acetone" Lan, Wen-Xiang; Tan, Qun; Wu, Jian-Guo (Department of Chemistry, Yuzhou University, Chungking 400033, Peop. Rep. China). abstract: a green route to the synthesis of piperonyl acetone [55418-52-5] is reported. this environmental-pollution free synthesis of piperonyl acetone involves the hydrogenation of piperonylene-acetone [4-(1,3-benzedioxole)-3-buten-2-one [3160-37-0]] from cinnamomum petrophilum leaves oil catalyzed by 5% Pd/C. the cinnamomum petrophilum leaves oil is an essential oil from leaves of a plant of cinnamomum petrophilum nees chao. the piperonyl acetone is a perfume and an intermediate of some medicines. thus, a mixt. of 1908.0g (purity 99.6%) of piperonyleneacetone, 15 g of 5% Pd/C, and 6000 mL of ethanal was stirred for 3.0 h at 120C, under hydrogen pressure of 1.5MPa to give 1671.5g of piperonyl acetone (purity 98.9%, yield 86.1%). this process can be given 85.8% yield of piperonyl acetone from piperonal[120-57-0] without any waste and waste water. [CAS 2002 136: 279398] [55418-52-5] piperonylacetone = 4-(3,4-Methylenedioxy)phenyl-2-butanone M( C11H12O3 ) = 192.21 g/mol if you like discussions about precursors & chems from natural sources, then please support our (hopefully) new forum by posting your opinion to: Post 353052 (3base: "new hive forum: natural sources", General Discourse) |
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Rhodium (Chief Bee) 09-16-02 20:49 No 357013 |
Note that this "piperonylacetone" is not MDP2P. | Bookmark | ||||||
Note that this "piperonylacetone" is not MDP2P. |
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Aurelius (Hive Bee) 09-17-02 06:35 No 357211 |
sure isn't | Bookmark | ||||||
But is the aminated product active at all? |
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terbium (Old P2P Cook) 09-17-02 06:41 No 357215 |
Something left out? | Bookmark | ||||||
this environmental-pollution free synthesis of piperonyl acetone involves the hydrogenation of piperonylene-acetone [4-(1,3-benzedioxole)-3-buten-2-one ... this process can be given 85.8% yield of piperonyl acetone from piperonal[120-57-0] without any waste and waste water. Seems like they must have intended to describe the condensation of piperonal with acetone to form the MDphenylbutenone which is then hydrogenated to the MDP2B. If so, then the only connection to cinnamomum petrophilum would be use of this plant as a source of safrole for conversion to piperonal. |
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Rhodium (Chief Bee) 09-17-02 17:52 No 357314 |
Aurelius: That is unknown. | Bookmark | ||||||
Aurelius: That is unknown. |
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