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2 739 836

(13)

(51)

IPC

C07C213/00(2006-01-01)

A01P11/00(2006-01-01)

C07C45/81(2006-01-01)

(21) (22)

Application

2020107256, 2020-02-18

(24)

Start date

2020-02-18

(22)

Actual filing date

2020-02-18

(45)

Published

2020-12-28

(72)

Inventor

Kochetov Aleksandr NikolaevichNosikova Lyubov AnatolevnaKuzmina Lyudmila Georgievna

(73)

Holder

Federalnoe Gosudarstvennoe Byudzhetnoe Obrazovatelnoe Uchrezhdenie Vysshego Obrazovaniya Tekhnologicheskij Universitet"

METHOD OF PRODUCING CRYSTALLINE MODIFICATION OF 1-(1-NAPHTHYL)-2-THIOUREA Russian patent published in 2020 - IPC C07C213/00 A01P11/00 C07C45/81

Abstract RU 2739836 C1

FIELD: chemistry.

SUBSTANCE: invention relates to a novel method of producing a crystalline form of 1-(1-naphthyl)-2-thiourea with a melting point of 195–197 °C and next values of parameters of crystallographic cell: spatial group C2/c, a=15.424(2) Å, b=7.636(1) Å, c=17.114(2) Å, β=91.584(2)°, Z=8.

EFFECT: novel method of crystallisation of a technical substance of a rat from a mixture of chloroform with a low-chain alcohol selected from isopropyl alcohol and n-propyl alcohol, which enables to obtain a crystalline modification of 1-(1-naphthyl)-2-thiourea, which contains a smaller number of impurities and is not a finely dispersed product requiring the use of enhanced protection measures for skin and respiratory apparatus.

1 cl, 1 tbl, 2 ex, 1 dwg

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RU 2 739 836 C1

Authors

Kochetov Aleksandr Nikolaevich

Nosikova Lyubov Anatolevna

Kuzmina Lyudmila Georgievna

Dates

2020-12-28—Published

2020-02-18—Filed