Question

СН2 – СН – С – су -CH2 CH -СН2 Ba СР,​

Answer 1

Answer:

A method, allowing alkylthioethanals to be synthesized in 80-93% yields, has been developed. It comprises the hydrolysis of bis-1,1-alkoxy-2-alkylthioethanes using two-phase system water -organic solvent. The method is applicable for both common aldehydes bearing lower radicals (R = Pr, Bu) and hitherto unknown highly boiling aldehydes (R = C 7 H 15 , C 8 H 17 , PhCH 2). It has been found that alkylthioethanals can spontaneously trimerize into 2,4,6-alkylthiotrioxanes. In basic media (1N NaOH, KF/Si(OEt) 4 /EtOH), alkylthioethanals affords the products of aldol self-condensation in up to 60% yield (1 H NMR). In competitive interaction (cross-aldol condensation) of butylthio-and alkoxyethanals with furan-or thiophen-2-carbaldehydes, the reactivity of sulfur-containing carbanions was shown to be more than six times higher than that of the alkoxy analogs.