Facile synthesis of unusual glycosyl carbamates and amino acid glycosides from propargyl 1,2-orthoesters as glycosyl donors

Ashif Y. Shaikh; Gopalsamy Sureshkumar; Debasish Pati; Sayam Sen Gupta; Srinivas Hotha

doi:10.1039/c1ob05056g

Facile synthesis of unusual glycosyl carbamates and amino acid glycosides from propargyl 1,2-orthoesters as glycosyl donors

Ashif Y. Shaikh, Gopalsamy Sureshkumar, Debasish Pati, Sayam Sen Gupta, Srinivas Hotha^*

^*Corresponding author for this work

20 Citations (Scopus)

Abstract

Propargyl 1,2-O-orthoesters are exploited for the synthesis of 1,2-trans O-glycosides of protected amino acids. N-Fmoc- and N-Cbz protected serine/threonine - benzyl/methyl esters reacted well with glucosyl-, galactosyl-, mannosyl- and lactosyl- derived propargyl 1,2-orthoesters affording respective 1,2-trans glycosides in good yields under AuBr ₃/4 Å MS Powder/CH ₂Cl ₂/rt. t-Boc serine derivative gave serine 1,2-orthoester and glycosyl carbamate. Optimized conditions enabled preparation of new glycosyl carbamates from N-Boc protected amines in a single step using gold catalysts and propargyl 1,2-orthoesters in excellent yields.

Original language	English
Journal	Organic and Biomolecular Chemistry
Volume	9
Issue number	17
Pages (from-to)	5951-5959
Number of pages	9
ISSN	1477-0520
DOIs	https://doi.org/10.1039/c1ob05056g
Publication status	Published - 7 Sept 2011

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title = "Facile synthesis of unusual glycosyl carbamates and amino acid glycosides from propargyl 1,2-orthoesters as glycosyl donors",

abstract = "Propargyl 1,2-O-orthoesters are exploited for the synthesis of 1,2-trans O-glycosides of protected amino acids. N-Fmoc- and N-Cbz protected serine/threonine - benzyl/methyl esters reacted well with glucosyl-, galactosyl-, mannosyl- and lactosyl- derived propargyl 1,2-orthoesters affording respective 1,2-trans glycosides in good yields under AuBr 3/4 {\AA} MS Powder/CH 2Cl 2/rt. t-Boc serine derivative gave serine 1,2-orthoester and glycosyl carbamate. Optimized conditions enabled preparation of new glycosyl carbamates from N-Boc protected amines in a single step using gold catalysts and propargyl 1,2-orthoesters in excellent yields.",

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T1 - Facile synthesis of unusual glycosyl carbamates and amino acid glycosides from propargyl 1,2-orthoesters as glycosyl donors

AU - Shaikh, Ashif Y.

AU - Sureshkumar, Gopalsamy

AU - Pati, Debasish

AU - Gupta, Sayam Sen

AU - Hotha, Srinivas

PY - 2011/9/7

Y1 - 2011/9/7

N2 - Propargyl 1,2-O-orthoesters are exploited for the synthesis of 1,2-trans O-glycosides of protected amino acids. N-Fmoc- and N-Cbz protected serine/threonine - benzyl/methyl esters reacted well with glucosyl-, galactosyl-, mannosyl- and lactosyl- derived propargyl 1,2-orthoesters affording respective 1,2-trans glycosides in good yields under AuBr 3/4 Å MS Powder/CH 2Cl 2/rt. t-Boc serine derivative gave serine 1,2-orthoester and glycosyl carbamate. Optimized conditions enabled preparation of new glycosyl carbamates from N-Boc protected amines in a single step using gold catalysts and propargyl 1,2-orthoesters in excellent yields.

AB - Propargyl 1,2-O-orthoesters are exploited for the synthesis of 1,2-trans O-glycosides of protected amino acids. N-Fmoc- and N-Cbz protected serine/threonine - benzyl/methyl esters reacted well with glucosyl-, galactosyl-, mannosyl- and lactosyl- derived propargyl 1,2-orthoesters affording respective 1,2-trans glycosides in good yields under AuBr 3/4 Å MS Powder/CH 2Cl 2/rt. t-Boc serine derivative gave serine 1,2-orthoester and glycosyl carbamate. Optimized conditions enabled preparation of new glycosyl carbamates from N-Boc protected amines in a single step using gold catalysts and propargyl 1,2-orthoesters in excellent yields.

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U2 - 10.1039/c1ob05056g

DO - 10.1039/c1ob05056g

M3 - Journal article

C2 - 21483986

AN - SCOPUS:80052041782

SN - 1477-0520

VL - 9

SP - 5951

EP - 5959

JO - Organic and Biomolecular Chemistry

JF - Organic and Biomolecular Chemistry

IS - 17

ER -

Facile synthesis of unusual glycosyl carbamates and amino acid glycosides from propargyl 1,2-orthoesters as glycosyl donors

Abstract

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