I found the field of Chemistry very interesting. Saw the article Lewis Base/Bronsted Acid Co-Catalyzed Asymmetric Thiolation of Alkenes with Acid-Controlled Divergent Regioselectivity published in 2019.0. Category: thiazolidines, Reprint Addresses Chen, ZM (corresponding author), Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai Key Lab Mol Engn Chiral Drugs, 800 Dongchuan Rd, Shanghai 200240, Peoples R China.; Liu, YY (corresponding author), East China Normal Univ, Sch Chem & Mol Engn, 500 Dongchuan Rd, Shanghai 200241, Peoples R China.. The CAS is 78-39-7. Through research, I have a further understanding and discovery of 1,1,1-Triethoxyethane
A divergent strategy for the facile preparation of various enantioenriched phenylthio-substituted lactones was developed based on Lewis base/Bronsted acid co-catalyzed thiolation of homoallylic acids. The acid-controlled regiodivergent cyclization (6-endo vs. 5-exo) and acid-mediated stereoselective rearrangement of phenylthio-substituted lactones were explored. Experimental and computational studies were performed to clarify the origins of the regioselectivity and enantioselectivity. The calculation results suggest that C-O and C-S bond formation might occur simultaneously, without formation of a commonly supposed catalyst-coordinated thiiranium ion intermediate and the potential pi-pi stacking between substrate and SPh as an important factor in the enantio-determining step. Finally, this methodology was applied in the rapid syntheses of the bioactive natural products (+)-ricciocarpin A and (R)-dodecan-4-olide.
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Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com