On September 1, 2016, Shyam Sundar, M.; Sahoo, Sibaprasad; Bedekar, Ashutosh V. published an article.Formula: C11H19ClO2 The title of the article was Synthesis and study of the structural properties of oxa[5]helicene derivatives. And the article contained the following:
The preparation of the (-)-menthyl carbonate of 2-hydroxy-7-oxa[5]helicene and its structural characterization is reported. Single crystal X-ray diffraction anal. established the relatively flat structure of oxa[5]helicene unit thus indicating the absence of stable helical isomers. The unit cell of the crystal includes one mol. in the P-conformation and another in the M-isomer. However, its nitro derivative, 1-nitro-2-hydroxy-7-oxa[5]helicene, provides sufficient steric crowding to observe two helical isomers at low temperature, as confirmed by 1H NMR at -20 °C. The experimental process involved the reaction of (1R,2S,5R)-2-Isopropyl-5-methylcyclohexyl carbonochloridate(cas: 14602-86-9).Formula: C11H19ClO2
The Article related to oxahelicene menthyl carbonate preparation structure conformation, Terpenes and Terpenoids: Monoterpenes (C10), Including Cannabinoids, Chrysanthemic Acids, and Iridoid Aglycons and other aspects.Formula: C11H19ClO2
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics