Organic Medicinal Chemicals Synthetic And Natural
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A modification of the above method of resolving racemic adrenaline is given in D. R. P. 269327. R- adrenaline, 182 VASOCONSTRICTORS AND VASO-DILATORS 221 parts, is dissolved, together with 150 parts of dextro-tartaric acid, in 1000 parts of hot methyl alcohol. L, sevo-adrenaline d-tartrate crystallises out on cooling, and, after several days' standing, is filtered off and purified by being twice recrystal- lised from methyl alcohol.
Other methods of preparing r-adrenaline are : (i) Diacetyl-pro...to-catechuic aldehyde (I) on condensa- tion with nitro-methane in feebly alkaline aqueous solution yields j8-hydroxyrj8-3 : 4-diacetoxy-phenyl-nitro-ethane (II). When this is mixed with the calculated quantity of formalde- hyde and reduced by zinc and acetic acid, j8-hydroxy-j3- 3 : 4-diacetoxy-phenyl-ethyl-methylamine (III) is formed, from which adrenaline is obtained on removal of the acetyl groups.
OAc OAc OAc AOAC ^ AOAC ^ \y \/.
CHO CH(OH)-CH 2 -NOo CH(OH)'CH 2 'NHMe (I) (II) ' (III) (N. Nagai, Jap.
What to read after Organic Medicinal Chemicals Synthetic And Natural?
You can find similar books in the "Read Also" column, or choose other free books by Marmaduke Barrowcliff to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
A modification of the above method of resolving racemic adrenaline is given in D. R. P. 269327. R- adrenaline, 182 VASOCONSTRICTORS AND VASO-DILATORS 221 parts, is dissolved, together with 150 parts of dextro-tartaric acid, in 1000 parts of hot methyl alcohol. L, sevo-adrenaline d-tartrate crystallises out on cooling, and, after several days' standing, is filtered off and purified by being twice recrystal- lised from methyl alcohol.
Other methods of preparing r-adrenaline are : (i) Diacetyl-pro...to-catechuic aldehyde (I) on condensa- tion with nitro-methane in feebly alkaline aqueous solution yields j8-hydroxyrj8-3 : 4-diacetoxy-phenyl-nitro-ethane (II). When this is mixed with the calculated quantity of formalde- hyde and reduced by zinc and acetic acid, j8-hydroxy-j3- 3 : 4-diacetoxy-phenyl-ethyl-methylamine (III) is formed, from which adrenaline is obtained on removal of the acetyl groups.
OAc OAc OAc AOAC ^ AOAC ^ \y \/.
CHO CH(OH)-CH 2 -NOo CH(OH)'CH 2 'NHMe (I) (II) ' (III) (N. Nagai, Jap.
What to read after Organic Medicinal Chemicals Synthetic And Natural?
You can find similar books in the "Read Also" column, or choose other free books by Marmaduke Barrowcliff to read onlineMoreLess
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