Studies on bioethanol production with thermo tolerant yeast isolates, their co-cultures using african wild cocoyam as feedstock was written by Chukwudi, I. Nnamchi;OkeChukwu, U. Nwachi;Ifeanyi, A. Ndubuisi;Onyetugo, C. Amadi. And the article was included in Asian Journal of Biotechnology and Bioresource Technology in 2021.Synthetic Route of C6H14O7 This article mentions the following:
In this work different ways of optimally producing bioethanol at various pH with thermotolerant yeasts, their cocultures using a non-human edible starchy food as feedstock was examined African wild cocoyam, Xanthosoma roseum, sourced from abandoned farmlands in Obukpa, Nsukka, Nigeria was used as the substrate, while strains of Kluyveromyces marxianus, Pichia stipitis were used to ferment them. First the tubers were gelatinized by boiling under pressure above 100°C before hydrolysis with concentrated H2SO4. The hydrolyzates were then fermented at 35°C with the thermotolerant yeasts for five days at different pH. Results obtained showed that gelatinized sample of the substrate gave optimum glucose yield when hydrolyzed with 1M H2SO4 for 60 min. Kluyveromyces marxianus produced more ethanol than Pichia stipitis at all the four fermentation pH values tested. However, optimum ethanol production was obtained when the two yeast strains were used as coculture at pH 4.5. The peak time for ethanol production was 96 h for the individual yeast cultures while that of their coculture was 72 h. The results of the study indicated that wild cocoyam is an excellent feedstock for bioethanol production with many advantages including being nonedible, thereby eliminating concerns for food security, containing high amount of carbohydrate. The study also revealed that fermenting sugar hydrolyzates with a coculture of microorganisms during bioethanol production is a more efficient process than using individual cultures. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Synthetic Route of C6H14O7).
(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. 2-(Arylmethylene)cyclopropylcarbinols could be converted to the corresponding tetrahydropyrans stereoselectively in the presence of Brønsted acids under mild conditions. A plausible Prins-type reaction mechanism has been proposed.Synthetic Route of C6H14O7
Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics