Integrated chemical process: an extremely concise synthesis of vitamin A was written by Orita, Akihiro;Yamashita, Yasuo;Toh, Akiji;Otera, Junzo. And the article was included in Angewandte Chemie, International Edition in English in 1997.Formula: C12H18O3 The following contents are mentioned in the article:
A one-pot procedure conducted stepwise under basic conditions gave an improved yield via an integrated chem. process. Lithium salt of a cyclogeranylsulfone treated with a dimethyloctadienal gave the addition product I which was converted to the MOM ether, underwent double elimination when exposed to MeOK to yield vitamin A. Addition of cyclohexane as a cosolvent in the elimination step increased the yield slightly. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Formula: C12H18O3).
(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Formula: C12H18O3
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics