Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1982-09-15
1984-07-17
Brown, Johnnie R.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
536 185, 536120, 568594, 568600, C07H 100, C07C 4718
Patent
active
044607679
ABSTRACT:
A process is disclosed for production of a sugar ketal, which comprises reacting a sugar with a ketone in the presence of (A) (1) copper, or an oxide, hydroxide or salt thereof and (2) hydrogen chloride or hydrogen bromide, or (B) cupric chloride or cupric bromide, said catalyst system being very effective in a small amount. The formation of unfavorable by-products can be reduced to a trace amount. The process offers the objective ketal in improved yields, and an industrially advantageous process.
REFERENCES:
patent: 3139443 (1964-06-01), Sosnovsky
patent: 3598804 (1971-08-01), Hindley et al.
patent: 3607862 (1971-09-01), Jaffe et al.
patent: 3622560 (1971-11-01), Hindley et al.
Aono Tetsuya
Matsumura Koichi
Brown Johnnie R.
Peselev Elli
Takeda Chemical Industries Ltd.
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