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One platform.
Every stage of chemical R&D.

From target molecule to manufacturing-ready chemistry, Chemstack carries discovery, scientific reasoning, experimentation, optimisation and technology transfer in one workspace.

Chemstack · AI Research
Live demo
How do I make (S)-ibuprofen?
An AI that's read all of chemistry

Three literature-grounded strategies reach the (S)-enantiomer. Ranked by stereochemical control:

CH₃COOH(S)
Asymmetric hydrogenationstereoselectivebest
BHC process3 steps · high atom economy
Enzymatic resolutionbiocatalytic

The methyl stereocenter can racemize. Asymmetric hydrogenation avoids it.

Chemstack · Retrosynthesis
Live demo

Target: Acetanilide

3-step disconnection
1Acetanilide· target
amide disconnection · N-acylationAniline + CH₃COCl
2Aniline
amine ⇐ nitro · reduction (FGI)Nitrobenzene
3Nitrobenzene
nitration (FGI)Benzene
Benzenebuyable ✓ · bulk commodity
Chemstack · Virtual Reactor
Live demo

C₆H₅NH₂ + CH₃COClC₆H₅NHCOCH₃ + HCl

Virtual pot · R-1010.0 °C · 1.00 bar
Pre-encounterReactingProduct formed
Frontier orbitals
HOMO
−5.51 eV
LUMO
−1.42 eV

gap 4.09 eV · reactive

Chemstack · Workspace
Live demo

Ibuprofen Program

Share
Ibuprofen Synthesis RouteRoute · 3 steps · 91% predictedJust updated
Board · 8 open

Yield Optimization

Live data

Scale-up plan

In review

Progress68%
The Journey

Discover, shortlist, validate.

Eight steps a chemist takes to synthesise a molecule on Chemstack, from target to handover.

01
Step 01

Start with your target molecule 

Draw a molecule, upload a structure, or describe your research objective in natural language. Chemstack understands your chemistry and starts building a research plan.

Input · Target molecule
ChemstackNew project
CH₃COOH(S)
draw·upload·describe

“A scalable route to (S)-ibuprofen under $20/kg, FTO-clear.”

02
Step 02

Understand the chemistry 

Chemstack studies your molecule across literature, patents and reaction knowledge, understanding the problem before proposing solutions.

Scientific context built
ChemstackSources
26,451 precedentsOrg. Lett. 2021, 23, 4410US 10,584,113 B2BHC process · 1997α-carbon racemization
03
Step 03

Discover the viable synthesis routes 

Deep Research generates thousands of possible pathways, evaluates feasibility, and ranks the most promising routes.

Ranked pathways
ChemstackRoutes
rank 1

1.2M

explored

126

feasible

10

shortlisted

04
Step 04

Shortlist the experiments 

From the ranked routes, Chemstack generates the Design of Experiment: which conditions to vary, which to hold, and which combinations are worth a flask. Thousands of candidates become the handful worth running.

DoE shortlist
ChemstackShortlist
DoE strategy · conditionspredicted yield
DoE-03Pd/C · HBr 44 eq · MeOH · 55 °C91%
DoE-07Pd/C · HBr 22 eq · MeOH · 50 °C88%
DoE-11Pd(OAc)₂ · none · EtOH · 50 °C74%
DoE-12Pd/C · HBr 44 eq · THF · 55 °C86%
DoE-15Ni · HBr 22 eq · MeOH · 25 °C41%
DoE-19Pd(OAc)₂ · HBr 44 eq · MeOH · 55 °C83%
DoE-22Ni · none · THF · 50 °C37%

combinations

12,648

DoE strategies

24

shortlisted

12

Scored on yield, cost and impurity risk · the handful worth a flask

05
Step 05

Virtualise before the laboratory 

Run the shortlisted experiments inside the Virtual Reactor. Each one is predicted for yield, impurities and conditions before a single flask is committed.

Bench-ready recommendation
ChemstackRun
yield91%
purity96.1%
cost$18/kg
safetycleared

12 shortlisted experiments · 2 survive every lens

06
Step 06

Generate laboratory procedures 

Convert optimised conditions into complete laboratory procedures: reagents, stoichiometry, execution steps and safety guidance.

Procedure ready
ChemstackExport
asymmetric hydrogenation · kilo-scalerev 6
  1. 01Charge arylacrylic acid (1.0 eq) and 2-MeTHF; sparge with N₂
  2. 02Add Ru-(S)-BINAP (0.5 mol%); pressurise to 8 bar H₂
  3. 03Stir at 40 °C for 6 h; monitor conversion by HPLC
  4. 04Crystallise; isolate (S)-ibuprofen
2-MeTHF·Ru-(S)-BINAP·40 °C · 8 bar
07
Step 07

Optimise every experiment 

Compare predicted and actual outcomes. When results differ, Optimization identifies the likely cause and recommends the conditions for the next run.

Continuous optimisation
ChemstackOptimise

91%

predicted

63%

actual

89%

optimized

Root cause: catalyst poisoning, sulfur impurity in feedstock lot #B-114.

guard bed + purification → next run

08
Step 08

Hand over to manufacturing 

Transfer validated chemistry with complete procedures, experiment history, audit records and technology-transfer documentation.

Manufacturing ready
ChemstackHand over
Validated procedurekilo-scale · rev 6
Experiment history14 runs · full provenance
Audit trail128 decisions · locked
Cost summary$16.20/kg at 500 kg

Manufacturing package · ready to ship →

Overview

Everything about the molecule, in one place.

  1. 01Target Definition
  2. 02Route Design
  3. 03Bench Feasibility
  4. 04Process Optimisation
  5. 05Technology Transfer

Formulation Development. Parallel track, same workspace.

One workspaceAudit-grade ledgerCross-project memory

Every decision logged against the chemistry that justified it. Cross-project memory surfaces learnings, unprompted.

Pricing

Unlimited molecules. Unlimited reactions.One subscription.

Straightforward seat licensing for process R&D teams. Every seat runs unlimited synthesis.

Enterprise

For teams up to 100 seats.

$10k

per seat, per year

  • Route Designer: scale-ready routes, ranked
  • Costing Engine: live $/kg for your geographies
  • Virtual Reactor: validate before the bench
  • Literature & IP: global papers and patents

Enterprise Plus

For teams above 100 seats.

Best value
$7.5k

per seat, per year

  • Everything in Enterprise
  • 25% saving on every seat

Tell us about your team and pipeline. We'll shape the agreement around it.

Prices in USD · terms & conditions apply

Bring your next molecule.

One molecule, from the question you draw to the process you hand over.