765-09-3Relevant articles and documents
Cason,Walba
, p. 669 (1972)
Total synthesis of N,O,O,O-tetraacetyl-d-ribo-phytosphingosine and its 2-epi-congener
Martinkova, Miroslava,Pomikalova, Kvetoslava,Gonda, Jozef
, p. 84 - 91,8 (2020/08/24)
Total synthesis of the natural d-ribo-phytosphingosine I and its 2-epimer III in the protected form was achieved through a common strategy. The aza-Claisen rearrangement of allylic thiocyanate (Z)-V incorporated the new stereogenic centre with nitrogen and the subsequent Wittig olefination constructed a non-polar side chain. Hydrogenation, followed by removal of protecting groups, completed the syntheses of I and III.
Hunsdiecker-type bromodecarboxylation of carboxylic acids with iodosobenzene diacetate
Camps, Pelayo,Lukach, Andrés E.,Pujol, Xavier,Vázquez, Santiago
, p. 2703 - 2707 (2007/10/03)
Carboxylic acids are bromodecarboxylated in moderate to good yields on reaction with iodosobenzene diacetate and bromine under irradiation with a tungsten lamp. The reaction works very well with carboxylic acids having a primary, secondary or tertiary α-carbon atom, although diphenylacetic acid gives benzophenone. Benzoic acid derivatives are bromodecarboxylated in moderate yields if electron-withdrawing substituents are present in the benzene ring, while they are recovered mostly unchanged if the substituents are electron-donating. Partially iodinated products have been isolated in low yield from the bis-bromodecarboxylation of dicarboxylic acids having two bridgehead α-carbon atoms. (C) 2000 Elsevier Science Ltd.