Phenyldiazomethane yields with the title alkene 1 a mixture of the trans-cyclopropane 6, benzopyran 8, pyrazole 9, and cis-dihydrofuran 12. The cyclopropane 6 thermally rearranges to a trans-dihydrofuran tentatively assigned the structure 4. © 1993.

C K GHOSH

S SAHANA

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Benzopyrans. 31. Reaction of 1,1-diacetyl-2-(6-methyl-4-oxo-4H-1-benzopyran-3-yl)ethylene with phenyldiazomethane

Tetrahedron

(Chemical Equation Presented) The Chemistry and application of the title aldehyde and some simple derivatives thereof are reviewed.

Journal of Heterocyclic Chemistry

Chemistry and application of 4-oxo-4H-1-benzopyran-3-carboxaldehyde

Heterocycles

Heterocycles directly linked to 3-position of1-Benzopyran-4-ones

ChemInform

ChemInform Abstract: Benzopyrans. Part 21. Reaction of 3-Acyl-4-oxo-4H-(1)benzopyrans with Diazomethane: Synthesis of Heterocycles Fused with (1)Benzopyran.

The Journal of Organic Chemistry

Cyclopropanation of .alpha.,.beta.-unsaturated carbonyl compounds and nitriles with diazo compounds. The nature of the involvement of transition-metal promoters

Space Science Reviews

SOT instrumentation

Aluminum oxide assisted stereoselective rearrangement of a cyclopropyl ketone to 4,5-dihydrofuran

J. Chem. Soc., Perkin Trans. 2

Kinetics of the decomposition of some Δ1-pyrazolines

Journal	Tetrahedron
Publisher	-
ISSN	0040-4020