𝔖 Bobbio Scriptorium
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1,3-Dipolar addition of diazomethane to 1-acetoxy-2-hydroxycyclo-hexa-3,5-diene. Synthesis of a couple of chiral Δ1-pyrazolines

✍ Scribed by Angela Patti; Giovanni Nicolosi; Mario Piattelli; Claudia Sanfilippo


Book ID
103977258
Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
250 KB
Volume
6
Category
Article
ISSN
0957-4166

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A Convenient New Synthesis of 4-Alkylide
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Probably the best precursors for T .M .M. biradicals (l and derivatives thereof) are the 4-alkylidene-A1 ' 2-pyrazolines first studied by Dowd 1 . Unfortunately the parent system 2 tends to undergo isomerisation1 ' 2 to give conjugated dienes, such as 3, and this may compete with the desired elimina