Author

3 article(s) from Sawamura, Masaya

Copper-catalyzed enantioselective conjugate reduction of α,β-unsaturated esters with chiral phenol–carbene ligands

Shohei Mimura,
Sho Mizushima,
Yohei Shimizu and
Masaya Sawamura

Full Research Paper
Published 31 Mar 2020

PDF
Album
1. Graphical Abstract
2. Scheme 1: Proposed catalytic cycle.
  
  Jump to Scheme 1
Supp. Info

Graphical Abstract

Beilstein J. Org. Chem. 2020, 16, 537–543, doi:10.3762/bjoc.16.50

Full Text

Copper-catalyzed stereoselective conjugate addition of alkylboranes to alkynoates

Takamichi Wakamatsu,
Kazunori Nagao,
Hirohisa Ohmiya and
Masaya Sawamura

Full Research Paper
Published 04 Dec 2015

PDF
Album
1. Graphical Abstract
2. Scheme 1: Conjugate addition of alkylborane 2a to alkynoate 3a.
  
  Jump to Scheme 1
3. Scheme 2: Synthesis of five membered carbocycle.
  
  Jump to Scheme 2
4. Scheme 3: Deuterium-labeling experiment.
  
  Jump to Scheme 3
5. Figure 1: Possible mechanism.
  
  Jump to Figure 1
6. Figure 2: Isomerization of the alkenylcopper intermediates.
  
  Jump to Figure 2
Supp. Info

Graphical Abstract

Beilstein J. Org. Chem. 2015, 11, 2444–2450, doi:10.3762/bjoc.11.265

Full Text

Intramolecular hydroamination of alkynic sulfonamides catalyzed by a gold–triethynylphosphine complex: Construction of azepine frameworks by 7-exo-dig cyclization

Hideto Ito,
Tomoya Harada,
Hirohisa Ohmiya and
Masaya Sawamura

Full Research Paper
Published 08 Jul 2011

PDF
Album
1. Graphical Abstract
2. Figure 1: Azepine frameworks found in natural products and pharmaceuticals.
  
  Jump to Figure 1
3. Figure 2: Semihollow-shaped triethynylphosphine L1.
  
  Jump to Figure 2
4. Figure 3: Time–conversion profiles for the gold-catalyzed cyclization of 4a with L1, X-Phos and IPr ligands.
  
  Jump to Figure 3
5. Scheme 1: 8-exo-dig cyclization of sulfonamide 9.
  
  Jump to Scheme 1
6. Scheme 2: Isomerization experiments of 6a.
  
  Jump to Scheme 2
7. Figure 4: Possible pathway for the gold-catalyzed conversion of 4a into 5a.
  
  Jump to Figure 4
Supp. Info

Graphical Abstract

Beilstein J. Org. Chem. 2011, 7, 951–959, doi:10.3762/bjoc.7.106

Full Text

Other Beilstein-Institut Open Science Activities

Keep Informed

RSS Feed

Subscribe to our Latest Articles RSS Feed.

Subscribe

Email Notification

Register and get informed about new articles.

Register

Follow the Beilstein-Institut

Twitter: @BeilsteinInst