... Tetrahedron Letters. Volume 29, Issue 46, 1988, Pages 5893-5895. Cover image. ... Bromination, in all cases, and chlorination for the other α-seleno-aldehydes lead to the α-halogenoaldehydes. Download full text in PDF. Tetrahedron Letters,Vo1.29,No.46,pp 5893-5896,1988 ...