Verschueren, Kris published the artcileA facile synthesis of 1,2,3,4-tetrahydro-7-hydroxyisoquinoline-3-carboxylic acid, a conformationally constrained tyrosine analog, Related Products of tetrahydroisoquinoline, the publication is Synthesis (1992), 458-60, database is CAplus.
A rapid synthesis of 1,2,3,4-tetrahydro-7-hydroxyisoquinoline-3-carboxylic acid (I) is given. Pictet-Spengler reaction on diiodo- or dibromo-substituted tyrosine, followed by catalytic dehalogenation gives the desired compound in high optical purity.
Synthesis published new progress about 142335-42-0. 142335-42-0 belongs to tetrahydroisoquinoline, auxiliary class Tetrahydroisoquinoline,Chiral,Carboxylic acid,Amide,Alcohol, name is (S)-2-(tert-Butoxycarbonyl)-7-hydroxy-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid, and the molecular formula is C27H23F6NO6S, Related Products of tetrahydroisoquinoline.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydroisoquinoline,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem