Yadykov, AV; Yaminova, LV; Krayushkin, MM; Shirinian, VZ in [Yadykov, Anton V.; Yaminova, Liana V.; Krayushkin, Mikhail M.; Shirinian, Valerii Z.] Russian Acad Sci, ND Zelinsky Inst Organ Chem, 47 Leninsky Prosp, Moscow 119991, Russia published Cyclization of Polarized Divinyl Ketones under Aqueous and Ambient Conditions in 2021, Cited 112. Application In Synthesis of 4-Methoxybenzaldehyde. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5.
An ‘on-water’ protocol has been developed for the synthesis of combretastatin A-4 (CA-4) analogues by cyclization of polarized triaryldivinyl ketones using hydrochloric acid as a promoter in 45-95% yields. The reaction time was reduced by about 30 times due to ultrasonic irradiation at ambient temperature. The other advantages of this new method are operational simplicity, easy workup, no column purification, and applicability on a gram-scale. It was shown that the amphiphilicity of the substrate and a low energy barrier of the reaction are a prerequisite for electrophilic and concerted reactions under aqueous and ambient conditions.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles