کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8288499 | 1536252 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transformation of naturally occurring (3R,3â²R,6â²R)-lutein and its fatty acid esters to (3 R)-β-cryptoxanthin and (3R,6â²R)-α-cryptoxanthin
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موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Transformation of naturally occurring (3R,3â²R,6â²R)-lutein and its fatty acid esters to (3 R)-β-cryptoxanthin and (3R,6â²R)-α-cryptoxanthin Transformation of naturally occurring (3R,3â²R,6â²R)-lutein and its fatty acid esters to (3 R)-β-cryptoxanthin and (3R,6â²R)-α-cryptoxanthin](/preview/png/8288499.png)
چکیده انگلیسی
The objective of this study was to develop straightforward processes that could be applied to the large-scale production of β-cryptoxanthin in an attempt to facilitate investigation of its biological activity. An oleoresin obtained from crude extracts of marigold flowers (Tagetes erecta) with approximately 24% total lutein fatty acid ester content was directly used as starting material for partial synthesis of (3 R)-β-cryptoxanthin under mild reaction conditions at ambient temperature. Therefore, acid-catalyzed deoxygenation of lutein esters from marigold oleoresin followed by hydrogenation in the presence of catalytic amount of platinum (Pt) supported on alumina (5%) at ambient temperature gave a mixture of (3 R)-β-cryptoxanthin fatty acid esters (major) and (3 R,6â²R)-α-cryptoxanthin fatty acid esters (minor). Saponification and Z-to-E isomerization of the product followed by crystallization gave a mixture of (3 R)-β-cryptoxanthin as the major product. Similarly, acid-catalyzed hydrogenation of unesterified (3 R,3â²R,6â²R)-lutein with Pt/alumina in ethyl acetate gave a mixture of (3 R,6â²R)-α-cryptoxanthin acetate (minor) in a one-pot reaction. Alkaline hydrolysis and Z-to-E isomerization of the mixture followed by crystallization provided (3 R)-β-cryptoxanthin.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Biochemistry and Biophysics - Volume 653, 1 September 2018, Pages 107-112
Journal: Archives of Biochemistry and Biophysics - Volume 653, 1 September 2018, Pages 107-112
نویسندگان
Frederick Khachik,