## Abstract A new simple route to (+)‐__cis__‐2‐methyl‐4‐propyl‐1,3‐oxathiane**,** the main component responsible of the passion fruit aroma is shown. Such a procedure consists in the sequence of the asymmetric conjugated addition of a thiol to __trans__‐2‐hexenal/cleavage of sulfide moiety, which
Enantioselective synthesis of (+)- and (−)-cis-2-methyl-4-propyl-1,3-oxathiane and their olfactive properties
✍ Scribed by Wihelm Pickenhagen; Helene Brönner-Schindler
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- German
- Weight
- 306 KB
- Volume
- 67
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
The enantioselective synthesis of (+)‐ and (−)‐cis‐2‐methyl‐4‐propyl‐1,3‐oxathine 8 and 9 form (E)‐2‐hezen‐1‐ol (1) as common starting material is described. The two enantiomeric forms exhibit different organoleptic properties.
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## Abstract 3‐Methyl‐1,3‐pentadiene has been polymerized with the Al(C~2~H~5~)~2~Cl/Nd(OCOC~7~H~15~)~3~/Al[CH~2~CH(CH~3~)~2~]~3~ system to crystalline polymers consisting essentially of cis‐1,4 units (≥80%). NMR examination has shown that the polymers have an isotactic structure. This conclusion wa