2180-37-2Relevant articles and documents
Optimized synthesis of L-m-tyrosine suitable for chemical scale-up
Humphrey, Cara E.,Furegati, Markus,Laumen, Kurt,Vecchia, Luigi La,Leuten, Thomas,Constanze D Mueller-Hartwieg,Voegtle, Markus
, p. 1069 - 1075 (2007)
This paper demonstrates how L-m-tyrosine 1 can be synthesized on larger-scale via enzyme-catalyzed kinetic resolution of N-acyl m-tyrosine methyl ester 4. N-Acyl m-tyrosme methyl ester 4 was prepared by a modification of Erlenmeyer's azalactone synthesis followed by hydrogenation of the resultant dehydroamino acid 12. The optimized four-step synthesis utilizes cheap and readily available starting materials and circumvents difficult purification protocols.
Deracemization of racemic amino acids using (R)- and (S)-alanine racemase chiral analogues as chiral converters
Paik, Man-Jeong,Jeon, So Hee,Kang, Jong Seong,Kim, Kwan Mook,Lee, Wonjae
, p. 2186 - 2188 (2014/12/10)
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FLUORINE RADIOLABELLING PROCESS
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Page/Page column 100, (2012/02/01)
The invention relates to a process for producing a process for producing an 18F-labelled compound, the process comprising treating a compound of formula (I): wherein EDG is an electron-donating group selected from -OH, -OR4, -NHR5 and -NR55R5; R1, R2, X1 and X2 are as defined herein; and R3 is selected from H, X3 and X4, wherein X3 is a monodentate cleavable surrogate group, and X4 is a bidentate cleavable surrogate group which is bonded (a) to said X or X and (b) to the ring carbon atom para to EDG; with [18F]fluoride in the presence of an oxidant, thereby producing, when R3 in the compound of formula (I) is H, an 18F-labelled compound of formula (II), wherein EDG is as defined above and R1, R2, X1 and X2 are as defined herein; or thereby producing, when R3 in the compound of formula (I) is said monodentate cleavable surrogate group X4, a compound of formula (Ilc), wherein EDG' is O, NR5, -NR55R5 or [OR4]+, and wherein R4, R5, R55, R1, R2, X1, X2 and X3 are as defined herein; or thereby producing, when R3 in the compound of formula (I) is said bidentate cleavable surrogate group X4, a compound of formula (IIc) or a compound of formula (IId), wherein EDG' is O, NR5, -NR55R5 or [OR4]+, and wherein R4, R5, R55, R1, R2, X1, X2 and X4 are as defined herein.