HETEROCYCLES
An International Journal for Reviews and Communications in Heterocyclic ChemistryWeb Edition ISSN: 1881-0942
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Annoucement
49th Congress of Heterocyclic Chemistry will be held from September 24, 2020 to September 26, 2020. For more information see: http://www.shinshu-u.ac.jp/faculty/engineering/chair/chem002/hetero49/
July 28, 2020
July 28, 2020
Extension of the deadline by end of Nov. 2020
Call for Contributions
HETEROCYCLES Special Issue Vol. 103 in honor of Professor Yasuyuki Kita on 77th Birthday
HETEROCYCLES Special Issue Vol. 103 in honor of Professor Yasuyuki Kita on 77th Birthday
Submission deadline: June 15, 2020
On the occasion of Professor Yasuyuki Kita's 77th birthday, we are planning to publish a special anniversary issue on March 1, 2021 as Vol. 103. Authors are invited to submit their work to this topical issue.
Authors wishing to submit their manuscript should contact us via e-mail by the end of January 2020. Manuscript should reach us no later than mid of June 2020.
Contact: submit@heterocycles.com
Editorial Office of HETEROCYCLES
January 8, 2020
Dear Authors,
I think you are in the middle of fighting COVID-19.
Concerned about the difficulty of carrying out your research due to the influence of COVID-19, Professor Kita has requested the editorial office to extend the deadline for the commemorative issue to celebrate his 77 years old. The publication date will be delayed, but we are happy to accept Professor Kita's request, and we would like to extend the deadline by the end of November 2020. Please submit your manuscript by that time.
I pray for overcoming COVID-19.
Kunio Ogasawara Editor
May 28, 2020
I think you are in the middle of fighting COVID-19.
Concerned about the difficulty of carrying out your research due to the influence of COVID-19, Professor Kita has requested the editorial office to extend the deadline for the commemorative issue to celebrate his 77 years old. The publication date will be delayed, but we are happy to accept Professor Kita's request, and we would like to extend the deadline by the end of November 2020. Please submit your manuscript by that time.
I pray for overcoming COVID-19.
Kunio Ogasawara Editor
May 28, 2020
Obituary
Rolf Huisgen(1920-2020)
Rolf Huisgen(1920-2020)
Professor Rolf Huisgen,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on March 26, 2020 at the age of 99.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 7, 2020
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December 24, 2019
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Report | Regular issue | Vol 23, No. 1, 1985, pp.153-157
Published online, 1st January, 1970■ 2,6-Dimethyl-3-cyano-4-thioxothiopyran and Related Molecules from Enaminonitriles and Hydrogen Sulfide by Phase Transfer Catalysis
Published online, 1st January, 1970
DOI: 10.3987/R-1985-01-0153
■ 2,6-Dimethyl-3-cyano-4-thioxothiopyran and Related Molecules from Enaminonitriles and Hydrogen Sulfide by Phase Transfer Catalysis
Jean-Pierre Roggero,* Serge Coen, Bernard Ragonnet, and Catherine Viellescazes
*Faculté des Sciences, Laboratorie de Chimie Organique, 33, rue Louis Pasteur, 84000 Avignon, France
Abstract
3-Aminocrotonitrile reacts with H2S in the presence of a phase transfer catalyst to yield 2,6-dimethyl-3-cyano-4-thioxothiopyran (liquid-solid catalysis) or the 4-oxo homolog (liquid-liquid catalysis). In the absence of hydrogen sulfide, 2,6-dimethyl-3-cyano-4-pyrone is obtained. The reaction mechanism is discussed.
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