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Synthesen mit aliphatischen Dialdehyden, XLIV. Chirale Pentamethincyanin‐Farbstoffe und Heterocyclen aus Derivaten des ( S )‐(+)‐2‐ sec ‐Butylmalonaldehyds
Author(s) -
Reichardt Christian,
Budnik Ulrich
Publication year - 1990
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19901231013
Subject(s) - chemistry , cyanine , medicinal chemistry , stereochemistry , fluorescence , quantum mechanics , physics
Syntheses with Aliphatic Dialdehydes. XLIV. — Chiral Pentamethine Cyanine Dyes and Heterocycles from Derivatives of (S)‐(+)‐2‐sec‐Butylmalonaldehyde Syntheses and UV/Vis‐spectroscopic properties of the chain‐substituted, homochiral pentamethine cyanine dyes 16 and 17 are described. 16 and 17 as well as the homochiral five‐, six‐, and seven‐membered heterocycles 11–15 are prepared from derivatives ( 5 and 6 ) of homochiral ( S )‐(+)‐2‐ sec ‐Butylmalonaldehyde ( 8 ), the first known chiral malonaldehyde, which in turn is synthesized in a seven‐step procedure from homochiral ( S )‐(‐)‐2‐methyl‐1‐butanol ( 1 ).