Roedig, Alfred published the artcilePolyhalogenated bicyclo[4.2.0]octa-1,5,7-trienes. IX. Synthesis and cyclodimerization of 1,2,4-trichloro-1-phenyl-1-buten-3-yne, Synthetic Route of 866-23-9, the publication is Liebigs Annalen der Chemie (1981), 1685-92, database is CAplus.
(Z)-(I) and (E)-PhCCl:CClCCCl (II) were prepared from (Z)- and (E)-PhCCl:CClCHO, resp., via PhCCl:CClCH:CCl2 or PhCCl:CClCH(OH)CHCl2 and PhCCl:CClCH(OSO2C6H4Me-4)CHCl2. (Z)-PhCCl:CClCCBr was prepared from (Z)-PhCCl:CClCHO via (Z)-PhCCl:CClCH:CBr2. In preparing (Z)-ClC(C6Cl5):CClCCCl, the Ph group in (Z)-PhCCl:CClCHClCHCl2 was perchlorinated by Ballester reagent to give intermediate (Z)-ClC(C6Cl5):CClCHClCHCl2. I and II dimerized slowly with partial decomposition in boiling hexane. The primary dimer III was unobtainable; only the pyrolysis product IV (Z = Cl2) was isolated, 7% from I and 40% yield from II. Hydrolyzing IV (Z = Cl2) gave IV (Z = O).
Liebigs Annalen der Chemie published new progress about 866-23-9. 866-23-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyltrichloromethylphosphonate, and the molecular formula is C5H10Cl3O3P, Synthetic Route of 866-23-9.
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https://en.wikipedia.org/wiki/Chloride,
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