A Convenient Synthesis of Functionalized 2,3-Diazaspiro[4.4]nona-1,6,8-trienes
Keyword(s):
X Ray
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A convenient Michael addition/cyclization sequence of alkyl isocyanide–acetylenic ester zwitterionic adducts with various pyrazolone derivatives, leading to the formation of dialkyl 6-(alkylamino)-1-methyl-4-oxo-3-phenyl-9-aryl-2,3-diazaspiro[4.4]nona-1,6,8-triene-7,8-dicarboxylates in moderate to good yields, is described. The structure of the target compounds was confirmed by an X-ray diffraction study.
1986 ◽
Vol 47
(1)
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pp. 133-138
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1987 ◽
Vol 48
(8)
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pp. 1357-1361
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1980 ◽
Vol 41
(C1)
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pp. C1-145-C1-146
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2007 ◽
Vol 2007
(suppl_26)
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pp. 477-482
2017 ◽
Vol 83
(12)
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pp. 34-37
Keyword(s):
Keyword(s):