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Synthesis of the macrocyclic thiocrown ethers 1,4,7,10,13,16,19-heptathiaheneicosane (21-S-7) and 1,4,7,10,13,16,19,22-octathiatetraeicosane (24-S-8)

โœ Scribed by Jilles J.H. Edema; Jan Buter; Richard M. Kellogg


Publisher
Elsevier Science
Year
1994
Tongue
French
Weight
248 KB
Volume
50
Category
Article
ISSN
0040-4020

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โœฆ Synopsis


The synthesis and characterization of the two macrocyclic s&ides, 1,4,7,lO,l3,16,19-heptathiaheneicosane (21-S-7) and 1,4,7,10,13,16,19,22-octathiatetraeicosane (24-S-8), are describedstarting from different combmationsof dithiols and dichlorides of differing chain lengths. C&O, is used for the cyclizations.


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โœ Shi, Hao ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› International Union of Crystallography ๐ŸŒ English โš– 963 KB

The title compound, C~22~H~28~O~8~, was prepared from the natural diterpenoid macrocalyxin J by two steps. It is built up from five fused rings: three six-membered rings and two five-membered rings. Two molecules are present in the asymmetric unit; both independent molecules have the same absolute c